A lot of people sell bait lots and individual baits here on the arena. Check out the for sale - for auction forum! A few other places to try are ecrater.com, shopgoodwill.com, and of course your local thrift stores!
As far as blind bags go, well, those are still pretty popular new items - harder to fin as baits. The easiet way to get a bunch is to look at Toys R Us to see if they still have the 12 pack.