Well good luck dealing with a "rattery". They make you sign a contract and agree not to ever breed the rats or forfeit the litters if they find out. That's assuming they even sell you one to begin with, which they won't if they learn you have snakes and/or breed feeder rodents. What a bunch of nazis =)
Petsmart sometimes has hairless rats, though only in the warmer months cause they don't want to ship them in the cold.