Pretty much the only way to make scales is to find a used Charge. I know, since I made the mod, that 1/8" on either side will still tighten up correctly. The Charge TTI or XTI or TI would be your best candidate since the pivot screws are way easier to service than those stupid knurled screws (mine will never come off again)
I am looking at a Wave right now and you might be able to epoxy some carved and shaped G10 to it?