I blew the passenger side head gasket. I'm wondering if I can just put it back on. How much would a shop charge to check and remove the warpage...if there is any?

 

Heads don't go bad BECAUSE OF a blown head gasket; rather, head gaskets blow BECAUSE OF bad heads.

However it's possible that the leaking combustion gases can scour a path on the surface of the head; so one could "go bad" that way.

There is no "this is what it costs", like buying a part from Summit or something, for machine work. You're wasting your time asking that question here. You need to be asking your machine shop. Last time I needed a pair of heads surfaced, it cost me $15 and took about 10 minutes, while I waited. It costs other people $100 and takes a couple of weeks. It depends on the shop and how well they know you and how busy they are and stuff like that.