Check out our site
www.yoogirls.com (which is a site where other webmasters/studios/amateurs can open their own clip stores and sell them while you earn a %) - guess that's what you're looking for.
We're selling this script too, on
http://www.pornsitetools.com/show_product.php?id=3 you'll find some basic information - hit me up at
[email protected] or icq for an individual quote and to discuss required extra features, etc.