2005 Sherco 3.2 parts

Hey all!
Its been a long time since I've been to an event or even visited this site.  I saw a few great trials folks the other day at the funeral of a friend and got bit by the trials bug.  When I quit riding, I had just damaged my 3.2.  I somehow managed to get off a tooth on the timing chain when I checked valve lash.  This caused contact between the piston and exhaust valves.  One valve broke and dinged up the head and piston.  I could PROBABLY get away with cleaning up the valve seats and installing new exhaust valves, but I'm leaning towards a new piston and head.  

Anybody happen to have (or know where to find) a used cylinder head?  Any suggestions on a good source for a piston?  I haven't talked to RYP yet.  I used to use Ryan for all my Sherco parts, but I'm scared to ask the price of these parts.  

I have a running 2 stroke - so at least I can start re-learning how to ride without sitting down!!  But I'd prefer to get the 4 stroke going before next season starts.

A complete parts bike is also a possibility.

Jim