Check out the Water Boys web site at
www.waterboys.com. They sell several piss videos and have links to others. There's also a guy back east named Michael Schein who has a fairly large catalogue of piss videos that aren't really slickly produced, but some are quite hot. He doesn't have a web site, but you can request his catalogue by writing to him at 76 Cranbrook Rd. #201, Cockeysville, MD 21030.