Traffic Cash Gold has Latex & Leg Fetish sites, 2 or 3 very good teen sites (Truly 18, Private Teens, Schoolgirls), and they also have at least 1 Peeing site, but this is a bit of a mystery. (They don't list the sites in the WM area, but I see my hits are still tracked and I got a sale not long ago)
ARS also has a lot of niche sites such as Golden Trickle for Watersports and Legs N Feet for Leg/Pantyhose, and their teen site is Teen Dreamer
You might also want to try out
TopBucks. They have iTeens as well as some nice-looking niche sites, and were just ranked as the #1 sponsor program according to the Statistician's latest test results.
Bruce