Yo Mark,
I have what you seek!
* ADULTSITEPASS.COM
These other ones could work in that genre but aren't exactly what you are looking for..
xxxmoviepass.net
easyadult.com
myadulthome.com
pornunion.com
showid.com
xxxmoviepass.net
They are all on Afternic but since Afternic cx'd adult they are landing there but the listings are more or less defunct. Give me a call if you want to discuss it
Cheers,
Brad