There are quite a few catboarding operators in the US, mostly located in the states of Colorado, Idaho and Alaska, as well as a few in other western states like Washington and even in Nevada! Most of them are based out of an established ski area, with the notable exception being Alaska (though Chugach Powder Guides is).
A cool concept a few ski areas have done is combining catboarding with resort riding. For example at Big Mountain Resort in Montana you purchase a lift ticket and pay an extra $100USD and you get to ride the lifts to the top, then the cat will take you outside the normal resort boundary where you drop into ungroomed terrain and ride back into the ski area to do it all over again! At Grand Targhee in Wyoming, a full day will cost you $299 but this place does get on average over 12m of snow a year.