I do, but it's my backup engine... got a '98 GTX LTD w/a blown everything for $400, and parted it out, keeping the 951 core, had it rebuilt and now it's ready to drop in any 951 ski.
There are a bunch on eBay, or see what parts your missing and send it in for a 1-2 year no fault.
I paid $800 for a '99 w/a blown engine (and unknown to me destroyed starter) last November. I had the engine rebuilt, and now it works great.
I hate it when people who don't know what they are doing take something apart and lose the parts / don't care. If you don't know what your doing, hey, that's fine, but at least put everything in the same box or something!
the '98 I bought, had a blown engine, rear piston was just... TOAST, and the rod was just whoa. but they took the rear electrical box apart (WHY?!) and they had the head off, but the pipe was still on it, as were the carbs. You could tell they had no idea how to actually take this thing apart...
Well,.... there's your problem...
http://www.flickr.com/photos/sabrtoothsq/6655429375/in/set-72157628746256301
lol.