If you ask these guys
http://www.pantyloving.com/ for access to the members area (same team as downblouse loving), you'll find some videos you can use (there are cameltoe videos in there). If you need images you'd have to make them yourself.
It doesn't rebill, but it does give nice $17 sales in CCBill (quite often)
Here's what's working for me
http://www.wehateporn.com/?s=panty+loving