Nice chips. Yes, I can verify that they are hard to come by. They were difficult even when they first came out in the early days of Chipco. I managed to get 1 of each image (8 different). I think the full set is 40 chips (8 images x 5 colors). Or possibly more?

As I'm sure you know, the graphics come from art deco period artists such as Roger Broders. Some (all?) of the images come from travel posters that touted Monte Carlo in that period. These are classic chips.