The only supplier I know off hand is Harlan Teklad. I was looking into some common rats (Sprauge Dawley), they were about $10 a piece, nothing special. Albino, produce about 9 in a litter, outcrossed.

You should check out Harlan's website, they have a few different strains of rats, and I assume they would also have some commonly used mice strains. Just understand you could end up paying a lot for these mice compared to petstores.

Here's your swiss mice
http://www.harlan.com/models/nd4.asp

http://www.harlan.com/
http://www.harlan.com/models/usmodels.asp