I might also check out
http://rokstarpipes.com/
http://americanpipemakers.com/
I know both of the guys who run the sites and I even have a couple pipes listed on APM (363 pipes).
Some other guys you might look into would be Warner Pipes, Briar Bird pipes, Thorpe Pipes, Joe Hinkle Pipes, or even Brandon Brookes. I know all of them as well and own some of their work.