Google prepagos medellin and it will return a ton of escort sites. From what I hear that may be your best bet. Or there is a Facebook group of girls that you can get in touch with and they will come over. Here is a Facebook girl. If you check out her friends you can probably tell which the others are. Most of the girls working have a bunch of old white guys as friends
https://www.facebook.com/profile.php...ef=friends.all