Well, Tropicana Cuba actually.

You can search for $4 chips at www.TyrusRex.com by either typing '$4' into the search engine and clicking on the 'Display Out-of-Stock Items' or by going to 'Casino Chips by Denomination' and entering $4 in both fields.

The first option will show you all $4 chips, including Out-of-Stock chips, but it also brings up some chips that aren't $4 in denomination. The second option will only show you chips that are available.

Tyrus