http://nevadajacks.net/
You won't be sorry. I've had a set of the actual Nevada Jacks with the skulls and they felt and looked great but I wasn't a fan of the skulls. I sold them and bought a set of the Desert Sands. I'm tell you, you'll be shocked how nice they are. Everyone who comes to my game for the first time always compliments the chips. They hold up great too.
Also, there are often alot of these chips in new unused sets on Ebay from time to time.