I couldn't get that cooper link to work. I check their page but didn't see anything about a "weathermaster" tire. I don't think you can go wrong for your first season with any winter tire. I'm sure they'll all work fine. That was what was recommended to me when I was asking around.
I got my steels from Tire Rack, follow this link:
You can get new 15's for $38 a piece. I'm sure you can find them in a junkyard for cheaper, but at least you know the new ones aren't already bent.
Tire Rack supplies you with the different lug nuts that you'll need also.
If you want something locally, check out Performance Wheel and Tire. They're located in the SE corner of Hampden and Santa Fe. They have just about everything. I just picked up some Mazda wheels there for the TypeR. They have a huge inventory.