Not much of a list, but they are large holes in the collection:

1) The Reserve Casino $100 Gazelle V1399
2) Terribles Town, Pahrump, NV $1 Millennium V5740
3) Circus Circus (LV) $100 Jester V2282
4) Mandalay Bay $100 Millennium 2000 V4824
5) Luxor $100 Millennium V4775

Alternates:
a) The Reserve Casino NCV $$$
b) Saddle West, Pahrump, NCV $$$