@boomerang,
Anytime Boomer.
I roughly know your area, and there are a great deal of tile setters up there, some are true masters {big website we all belong to} so there very well may be a tile setter with the proper tools.
The main reason I suggested the counter top guys, is the fact that I'm not real sure what you are attempting.....if you are going with a bowl type sink...
http://www.lmsstores.com/users/11634/pictures/Bowl%20Sink.JPG
....it would depend on where your water lines are coming from....in the picture it's thru the stone, which means at least 1 and up to 3 more holes are needed....counter top guys usually have all that stuff on hand {templates and whatnot} as well as the piece of pipe called the drain body, which is the first piece that connects to the sink, and would be the
actual size needed for the drain hole.
Also if you wanted to partially sink the sink into the top, a counter top guy would be able to do that as well. The whole project is more in their area than a tile guys.