www.chewie.com has a nice snow suit that covers all 4 legs, they have vests also if you don't want legs covered.
Dog Boots, Shoes & Booties | Alldogboots.com has a nice selection of booties, I believe one of YT members sell them, thing with booties is you really have to start getting a dog use to them at a very early age. I am sure with lots of patience, consistency and treat rewards a dog can get use to them.