Living World has a starter kit for a variety of small animals.
Pennine Rat Starter Kit | Feedem
Amazon.com : PawHut 2-Tier Hamster Cage, Small Animal Habitat for Rats, Gerbils, Mesh Wire Ventilated Enclosure with Exercise Wheel, Water Bottle, and Food Dishes : Pet Supplies
Rat Cage Review: All Living Things Rat Starter Kit - YouTube