Considering the way overpriced cost of buying single frozen rodents from most any chain pet store I think you'd be a lot farther ahead to purchase a used small cubic freezer. I bought one years ago, used but in new condition for $50.00 Check out your local craigslist and used appliance stores, even some Salvation Army stores carry used appliances.

I haven't ordered f/t rodents in a few years but I always preferred www.themousefactory.com Their customer service and quality product really impressed me back then.

The other option is to find out if there are any snake shows within reasonable driving distance. Most shows would normally have a f/t rodent dealer as a vendor there.