Where to get frozen baby rats

Does anyone know of a store that sells frozen baby rats? I've been to a few so far and all they had was regular rats. My snake is about four months old and I need to feed him something bigger than mouse fuzzies. I heard rats were better than mice so that's why I want to try them.

I'm not sure that the online places are worth it because of the high shipping costs. I only have one snake so he won't eat that much. I am in Seattle if that helps.

I know Petsmart and Petco sell frozen rats and mice. Rats are not for say "better" than mice, rats get bigger than mice so most larger snakes would only have to eat one larger rat instead of multiple mice.
As far as ordering online it would be more upfront because of shipping but in the long run it would be cheaper.

If you're feeding a young Bp, it should already be able to eat hopper sized mice.

Petsmart/Petco/order online