07 TE450 engine repair

Sometime ago checking out the bike it wouldn’t turn over, squirted oil into the spark plug hole to see if the rings were stuck in the bore. But no improvement had me pull the clutch cover to investigate further. Digging deeper found bent ex valves stuck open in the head, contact marks on the piston and a bad rod on the crank. So about $600-700 in parts no labor - kibblewhite ss ex valves guides seals keepers spring kit, pro x rod kit, wiseco piston kit, gaskets. No main brg seal kit found. Looking to get the crank & head rebuilt. Any suggestions on where would be appreciated. Roller is in great condition providing motivation. Located in so cal. Tia