The JM-1 is a bit of an oddity, not quite a jazzmaster or a jaguar, a bit of a blend of both. As such, no commercially available pickguard will fit perfectly and I couldn't replicate it accurately with out an original to go off. Zeromick has used a jazzmaster pickguard on his jm, but he needed to mod pretty heavily to get everything to fit. Check it out here http://www.buildyourownguitar.com.au...ead.php?t=4071