What does a regrind cost?
Last time I looked it was $140. I think it was Schneider's website. Anyhow it won't break the bank.
Skooter: Depending on how concave they're probably re-surfaceable. You'll notice that the base circle of the cam is not much above the adjacent casting. That's how much you have to work with when regrinding and that's the limit of increase in lift if that's you want