Crippler,
Man, that sucks. You could try Baxters(
www.baxtercycle.com) for a used engine or head(if the rest of your engine is good). They stock a pretty good selection of parts from breakers. No idea what it would cost, but worth a call anyways. Or sell it as a parts bike and try to find a newer one.
Good luck with it.
Erv
Deep in the Heart of Texas!!