Phyllis,

I can think of two places off the top of my head:

Gaming Times
4045 So. Buffalo Dr.
#a-101-282
Las Vegas NV
(702)876-6020
This is a fairly new location for them, so I haven't been there yet.

The other place of which I can think is at the Tropicana Hotel & Casino. There they house the Casino Legends Hall of Fame. Just before you enter this, there is a shop which sells obsoletes and other casino collectibles. Be sure to see the Hall of Fame while you are there. If your are a member of CC & GTCC, your membership card will get you in free. If you're not, maybe someone else can tell you where to get a freebie or twofer. Hope this helps.

Kerry