The guy that did my mirror doesn't do them anymore. It was expensive. About $250. Now, there is a company doing these kind of parts down in Florida. Their website is American Carcraft and they have done some xBs including Louis' camo xB with the full on mirrored engine bay.
I don't know their prices, but the quality of their work is good and they treated Louis quite well.
Here is my underhood:
Also, the ScienrgyGA guys got someone to do some nice underhood pieces for them to rep the club. Many of you may have seen their debut at the NOPI Nationals last year. Talk to Baine if you want something like that. You can reach him on Scinergy Nationwide Website. I don't have a picture though.