I do, but you have to travel North! SD

San Diego Golden Shower Goddess

However, as you've learned this is not something most seek so it will take some searching to find.  Especially since what is most commonly sought after--and hence readily available--when seeing a Tijuana sexoservadora are:
--GFE (girl friend experience) sessions
--Prices way better than in the US

If I were seeking a GS:
--I'd contact escort agency owners.  They've heard it all before and can fulfill the majority (but certainly not all) of the requests they receive.
--I'd look for a skank/walker in the Zona.  Walkers are so desperate for drug money they're known to do anything.  (That being said, be careful as they have a higher STD rate than most; hence I don't see them).
--I'd get a throw away cell phone and hand out some cards with the number to street girls, walkers, etc. promising a finders  fee (whatever you're willing to pay) to whoever makes it happen.  (Obviously I'd keep what I want verbal and just put the number on the card.