To the OP....
I know a guy that is a professional rat and mouse breeder (he paid for his rodent breeding facilities with what he made selling them, and even has his own brand of rodent block custom blended and bagged). He does ship them all over the US. He is in Indiana, and I'm sure Knoxville shipping wouldn't be horrible. Just have them shipped to you until you get your car.
PM me and I'll give you his contact info.
Or there is always the big name places (rodent pro, mouse factory, big cheese rodents etc....just do a google search.)
Shipping would more than likely be cheaper than a vet bill.