There are a lot of them. Have you ever used the The Chip Guide querry facility? Here is a link:
http://chipguide.themogh.org/cg_query.php
It is pretty helpful. One thing to keep in mind if you are thinking about trying to get chips from a Casino/Card room is how easy/difficult it will be. Large Card Rooms are going to be the easiest, especially for someone that is a regular poker player.