You can dig through http://www.mundoanuncio.com/costarica and find their ads.
I think they are in the south eastern section of San Pedro.
There are many other available advertisers on the M/A site as well...you may have to troll through travesties and guys to get to the girls though.
as an aside, this and many other similar web sites options (Facebook, Badoo,Tagged, Hi5, LACupid...etc) ) are part of the reason we see a drop off of talent in the DR, SL . Why hang around in that atmosphere for hours looking for what may be a score when they can arrange appointments on line and get the same results?
smarter than you give them credit for