Where to get valve guides

[jman093]

As title says. I'm looking for new exhaust valve guides. Looking at olds posts it seems they're availalble somewhere, but I can't find any.

I just got hosed by the race/machine shop I went to. I received my heads back Wednesday supposedly ready to bolt on, but upon disassembling them so I could send them off to Ben for porting here soon, I've found some significant problems.

Thanks

[unchained01]

What motor specifically ?