I have a car seat for Harley that is made by Pet Gear. From what I can tell it is made very similiar to the Snoozer brand (have only seen them online), but I like the way that the seatbelt goes through the bottom rather than the top and the price being lower is a bonus too. I have the medium and it only has one guide to attach a harness to. It is a nice size, pretty well takes up an entire captains chair! Harley loves it and I feel much better knowing that he is secured. Oh and if you don't mind a patterned cover you can get a heated version too!
Dog Beds, Dog Houses, Kennels, Cat Furniture, Pet Strollers, & Pet Furniture: Pet Gear - Booster Pet Car Seat in Charcoal
Jeri and Harley