Iris makes a big tub..4 1/2 feet long or so but theyre not very tall for a carpet. What are they, 14 inches tall? I can't remember. Anyways I'm planning on building cages for mine and my boa when they need it..if you've got the know how it wouldn't be too expensive.

As far as finding the snake the moreliapythons site has classifieds, and kingsnake always has some but do some research before you buy from anyone.