What is a good online retailer for XRCD's, etc.

I am looking for an online source for XRCD's, HDCD's, Hybrid SACD's, Gold CD's and other "audiophile" recordings. I have looked at all the typical online sites including HDCD.com and XRCD.com as well as cdconnection, cdnow, towerrecords, etc etc.

Does anyone know of a good place to buy this stuff?