The target around here didn't have any either. We looked all over the place. My general rule is, once a snake hits 1000g, move them into a 41qt, though since my 41qt is not working, I have all my girls in 32qts and they are doing fine (eating and breeding) So a 28qt would be fine until they are 1000g or so? I ask because I'm about to build the same rack and since we can't find 32qt tubs around here I'm going to have to go with 28qts.