Just based on my recollection, $100 machines seem pretty common in the high limit areas of all the big Strip casinos. You'll find $10 even on the main floor at a lot of places. Not sure about downtown, though.

If you're looking for VP specifically, vpfree2.com has a user-maintained database of games. Some casinos also maintain their own database of slot machines on their official website, which includes locations on the casino floor.