There are a lot of Dominicans leaving NY for various reasons with many ending up in the South. There must be thousands of such in the Central Florida area.
All I can tell you is tell your buddy to make sure he has Mexican type of food too, as I remember when I was stationed in Ft Bragg in the 80's that Sanford had a large percentage of Mexicans. I bet it's much more now.
Also, I have a friend who lives about a half hour North of Sanford whose wife is Dominican. Send him an email at
daveswiers@yahoo.com - I'm sure his wife would love to meet other Domincans in the area.