Is there a rebuild "kit" for a head?

I've seen the various parts like rocker arm assemblies and such sold separately.

The head gasket kits seem to include valve stem seals, cam seals, etc., but what about the other pieces I may need.

I'm asking because I just bought a used head and am thinking of rebuilding it.

Before I do anything I guess I'll take it to a shop and see what they'd charge to check it out and rebuild it if needed.

Thanks for any thoughts.