I'm getting a fuzzy picture of just what it is you are trying to do, I take it that you have a stratocaster??? and you want to put a humbucker in the bridge position, you can get a new pickguard thats cut out for the humbucker, you will have to remove some wood from the strat body, Do you have any woodworking skills? or tools?, plan ahead and don't hack it up, if you don't think you can do it, find someone who can, or you may soon be playing air guitar. For the pickguard, you might want to try Warmoth or W-D Products, they used to have pickguards with any pickup combo you wanted. Expierence has taught me to plan out what I want to do, get the parts I need before I start, and take my time when I start, Good Luck