So, I decided to make a batch of brass brackets for this purpose. The one thing I have a hard time finding is a #3-48 screws with a short body (or any body). I found them for metric pups, but not for UNC. Does anyone have an idea where to get some? In the past, I have made these brackets by hand, and I would just hand-file a couple of the threads near the head, so the screws spin freely in the thread when fully inserted. I guess that I can keep doing it, but it would be nice to find some screws already made. The advantage in this method is that the the pup threads don't get ruined, if you want to swap them out and use them in a different guitar.