JavaScript Find radio and checkbox name using surrounding labeltext with Jquery

I'm trying to accomplish the following with Jquery:

When the "No Top" radio-button is "checked" it should disable and "uncheck" any selection done in the Checkbox selection.

If the user select another radio-button option for example "Black Top", the Checkbox selection should be enabled again.

I'm trying to solve this problem but can't figure out how to find the correct radio-button or checkbox using the labels text (that's all I have to go on). I can't use the ID's because it renders with different names all the time.

Clarification: The first div class "option-box" contains the radio set which then follows a second div class "option-box" with the checkboxes. The page have more controls both radio and checkboxes but it is just the checkboxes inside the second "option-class" I'm trying to manipulate.

Any ides?

Here is the code that my controls generate (which I cant modify):

<div class="option-box">
    <div class="radio">
        <label>
            <input id="ctl00_PageContent_ctl00_KitsList_ctl03_KitComponent_4_0" name="ctl00$PageContent$ctl00$KitsList$ctl03$KitComponent_4" value="0" checked="checked" type="radio" />
            No Top
        </label>
    </div>
    <div class="radio">
        <label>
            <input id="ctl00_PageContent_ctl00_KitsList_ctl03_KitComponent_4_1" name="ctl00$PageContent$ctl00$KitsList$ctl03$KitComponent_4" value="8" onclick="javascript:setTimeout('__doPostBack(\'ctl00$PageContent$ctl00$KitsList$ctl03$KitComponent_4$1\',\'\')', 0)" type="radio" />
            Black Top
        </label>
    </div>
    <div class="radio">
        <label>
            <input id="ctl00_PageContent_ctl00_KitsList_ctl03_KitComponent_4_2" name="ctl00$PageContent$ctl00$KitsList$ctl03$KitComponent_4" value="9" onclick="javascript:setTimeout('__doPostBack(\'ctl00$PageContent$ctl00$KitsList$ctl03$KitComponent_4$2\',\'\')', 0)" type="radio" />
            White Top
        </label>
    </div>
    <div class="radio">
        <label>
            <input id="ctl00_PageContent_ctl00_KitsList_ctl03_KitComponent_4_3" name="ctl00$PageContent$ctl00$KitsList$ctl03$KitComponent_4" value="10" onclick="javascript:setTimeout('__doPostBack(\'ctl00$PageContent$ctl00$KitsList$ctl03$KitComponent_4$3\',\'\')', 0)" type="radio" />
            Silver Top
        </label>
    </div>
</div>

<div class="option-box">
    <div class="checkbox">
        <label>
            <input id="ctl00_PageContent_ctl00_KitsList_ctl04_KitComponent_10_0" name="ctl00$PageContent$ctl00$KitsList$ctl04$KitComponent_10$0" onclick="javascript:setTimeout('__doPostBack(\'ctl00$PageContent$ctl00$KitsList$ctl04$KitComponent_10$0\',\'\')', 0)" value="11" type="checkbox" />
            Backdoor
        </label>
    </div>
    <div class="checkbox">
        <label>
            <input id="ctl00_PageContent_ctl00_KitsList_ctl04_KitComponent_10_1" name="ctl00$PageContent$ctl00$KitsList$ctl04$KitComponent_10$1" onclick="javascript:setTimeout('__doPostBack(\'ctl00$PageContent$ctl00$KitsList$ctl04$KitComponent_10$1\',\'\')', 0)" value="12" type="checkbox" />
            Topdoor
        </label>
    </div>
</div>

You can differentiate the inputs by their type attribute, something like this:

$('.option-box input[type="radio"]').change(function() {
    $('.option-box input[type="checkbox"]').prop({
        'disabled': $(this).val() == "0", 
        'checked': false
    });
});

Example fiddle

If there are multiple copies of this .option-box structure in the page you can use DOM traversal to find the one related to that which raised the event:

$('.option-box input[type="radio"]').change(function() {
    $(this).closest('.option-box').next('.option-box').find('input[type="checkbox"]').prop({
        'disabled': $(this).val() == "0", 
        'checked': false
    });
});

Example fiddle

If you cannot use any id nor the input VALUE, you can try like this

$(document).ready(function () {
  $( '.option-box' ).on( 'click', 'input[type="radio"]', function() {
    var labelContent = $( this ).parents(".radio").find( "label" ).html();
    if( labelContent.indexOf( "No Top" ) > -1 ) {
      $( ".checkbox input" ).attr( "disabled", "disabled" ).removeAttr( "checked" );
    } else {
      $( ".checkbox input" ).removeAttr( "disabled" );
    }
  });
});