Christopher Woods can cut you an RG body with the ZR route, but you still have to get a ZR. Rich doesn't have any but I think
Cottam guitars could probably order you one. I think they are pretty expesive though, probably around $350-400. I've seen one on **** and it didn't last long. Your best bet would be to buy a cheap s470 off the bay and sell everything but the ZR. There are a couple cheap s470's on the bay right now. I agree with you though, I would love to be able to purchase the ZR as a kit.