Looking for a replacement engine for a 82 XC250

Hello fellow Husky guys. The big search begins! I hurt it real bad and am looking for a replacement engine and pipe that would work in a 82 XC250 frame. Any ideas? I would prefer a 430 but a 390-500 would probably fit? I know, everyone is looking for a CR/XC430 but maybe there is one out there? Any leads would be appreciated. Maybe someone is looking for a real nice rolling chasis to build their own dream bike?
Thanks,
Mike

Mike- what'd you do to it? If the cases are OK then changing it to 430 is snap: new gears (including clutch/primary), cylinder studs, cylinder, head & pipe- all easy to find on either eBay or Mark's vintage site plus Hall's, Up Tite or Vintage Husky. Wouldn't do a 500 but rebuilding a 250 should be a snap though.

Can you make a list of parts needed to turn the 250 into a 430? The motor in my 83 250 xc has bad crank bearings and I'm looking into rebuilding the engine looks like its going to run me right around $500. The 430 sound interesting..

Cylinder, head, piston, rod & crank, gears (would have to investigate if any are interchangeable), cylinder studs, clutch ring (has the gear on back for primary), pinion gear, reed assembly, pipe, carb jets. Most if not all can be sourced from this site, Mark's Vintage site or eBay.