The screws on my Tribute's control cavity plate don't screw into the wood, but into small threaded bushings. I imagine all Alembics have this feature. I want to get similar screws/bushings to mount the pickup rings on other brands of guitar because I swap pickups a lot. I've looked everywhere for small hardware pieces like this, for example AllParts and StewMac, but all I can find is bushings for tuning machines and bridges. Anyone know where I can get screws and bushings appropriately sized for mounting pickup rings?