Salle Chevrolet has quite a few options as well. Some are GM-built crates and some are GM-built crates that are tweaked by Sallee. I have a clone of the GM ZZ430 built by Sallee and so far it has been an excellent engine. I am not sure what shipping would cost you since they are in OR but it was not too bad from OR to AZ.
http://www.sallee-chevrolet.com/Crat...rformance.html