I totally agree with you, but it seems that this is the protocol that has already been established. I personally would love a publicly published list of vendors, their prices and their contact info, but I think there is a big fear of them getting shut down by Lucasfilm. Of course someone from Lucasfilm could easily create an account here on the forums and get all the info they needed just by asking via PM's.
Anyways, I don't want to hijack this thread - I personally will be getting a Master Replica's helmet when the time comes. I'm not a big fan of the smaller mouth and how the ears stick out a big farther from the head, but in person, they look really nice and impressive. I think it's a good deal for the price. Plus, you don't have to assemble it!