The surplus ones will work just fine, Jocelyn. I'll stop by the Costco here and see if they have the same ones that Missoula has. Depending on the type of terrain you go through, and I'm thinking of the lab here, the "bear paw" style is more the kind you would want. The tailed types are more for open tundra or plains use, that is why the military uses them for Alaska winter use.
Yesterday, Paul and I visited a few thrift shops in Missoula. No snowshoes (you're right, Fred, they were gone at Secret Seconds!), but we found lots of other things. We ran out of time to look at Costco or a sporting goods store.
Interesting comments about "bear claw" versus "long tail" style. I'd have to agree that our uneven, very hilly terrain would likely work better with snowshoes without a long tail.
I'll look online later (I have accounting to do and a community feast to prepare for tonight!), and will perhaps make another stop or two on our next trip to town.