Cylinder Head Rebuild Question
 

I have the head off of my 2005 S2k motor and the machine shop has informed me that 4 of the exhaust valve seats are trashed beyond repair. I either need to find replacement valve seats or a different head. 4Piston told me the valve seats can be replaced but of course they stopped responding after I asked about buying them. Does anyone know where replacement exhaust valve seats can be found? I’d much rather stick with the original head off this motor than buying another that could be in as bad of shape. Used heads are not cheap or easy to find.