These have been released for a while. I haven't seen any thing on them, so here goes.

Originally they could only be obtained by running up a certain amount of points each week on your slot card. I believe it was a minimum of 1000 points. Then you had to come back the following week to receive your token. This went on for 6 succesive weeks to get the whole set. It wasn't very popular and the Sunset Station Casino was stuck with many of them. I don't know how many were minted.

At any rate, they decided to sell them over the counter ($30 for the set).