I don't know of any shops anymore, but Bob from http://www.commproducts.net/ is a great guy. It looks like he has shut down his retail shop, but I bet he would be stoked to meet up and help you out.
Comm Products was pretty much the only one here in the valley and he closed his doors a few months back and went to internet sales only. He is still worth calling and I'm sure he can arrange local pickup.