These are all listed under Agua Caliente in Rancho Mirage. I see 5 $25 listings and two $100's. The listing includes 12 different $5's with singer's names on them.

There are 36 others cataloged under Spa Hotel & Casino in Palm Springs.

I don't think I have any extras, but this gives you an idea of how many different exist. The California Indian Casinos are not a part of the California Chip Guide, which is mostly card rooms. You might be able to get just this list from him.