Take this photo and email it to kinkos. Tell em to print it out with the humbuckers scaled to their correct dimensions, then cut it out. Or, tell em to print on a transparency, slap that baby on an overhead projector, move the projector towards the wall till the humbuckers are the right size, and trace it.
Id show you the photos if i knew how to post em.... wait let me take 5 seconds to read how to do it...
ok here are some photos...

here is some i drew in autocad



adam