I know of a few but none that are "low volume" even though they want you to think they are.  Besides the ones I know are not really UTR so I don't have a suggestion.  Sorry  Joe

Hello!  
I see about 4-5 folks a week, as my rates and marketing are geared towards longer, high quality dates. I would love to come back soon (based in LA) and see you; please avail yourself of my site and reviews to see if I fit your bill besides being lower volume and thin/athletic!  
xoxox
Harlowe

I agree!!!