I have a long list here:
where to get fabric
I HIGHLY recommend:
http://www.sewzannesfabrics.com/ (I ordered on a Monday morning and it arrived Tuesday PM!!!! WOW) and a super great mama too

She has PRR as well as Lili Paris and more.
If you are looking for buying and trading I have a list on Yahoo, but I'm not sure I can post that link here. Just do a search for fabric trade.
Oh and I have had great luck here:
http://theporridgepot.com . They run auctions on eBay but also have some PRR (Painting Red Rhinos) on their site.