I had never seen any either...but *thought* that I *knew* that they existed. They did. I think that they're made by Hans Hall, but not sure. Who ever makes them...they worked awesome. Super smooth, quite....nice. In fact, they ride better than regular Bomb steel tracks do on man made snow, IMO.
I think the coolest part was after the end of the parade, there was too much "parade traffic" to load the cat back up on the street, so we drove to where we COULD load it, w/o blocking traffic. THe cat pulled up to a 4 way intersection w/a light. Light turned green, and BRAA-BRA-BRA-BRAAAAAAAAAA, full sticks, 2200 RPM right down SR 224! Awesome.