The Crittertrail Mini Two that I ordered arrived to-day, as did the two water bottles that I ordered for use with the larger of the two carriers. I am pleased with the way that the Mini Two packs-up for storage or shipment. In any case, I could now in good conscience buy a small rodent, as I have a decent home in which to put it.
(The Mini Two has a handle such that it too could be used as a carrier, but I think that it would be best if the rodent felt that its home were stable.)
Unfortunately, I haven't found a local mouse breeder. I can buy a mouse from one of many pet stores, but I'd prefer to buy one from a breeder, as there are much the same issues with the breeding of
exotic pets as with dogs and with cats — inhumane breeders and all that. Which is not to say that I would refuse to buy a mouse from, say, PetSmart, but that at least ceteris paribus I would rather buy from a breeder who allowed inspection of the environment in which the animals were bred and housed.