i've seen them on kingsnake.com and at some reptile shows. NO THEY WILL NOT LIVE ON CRICKETS, they need to be fed live ants or they slowly starve to death over a month or two.
i did see a supplier of live ants in a reptiles magazine advertisement but i can't remember who it was for the life of me. google around for live ants.
if you're determined to keep one, it can be done, but there are a lot of other great reptiles that are more suited to captive care.
good luck.