You are missing one of the benifits of feeding frozen...buying in bulk. There are some good rodent supply companies/websites that will ship you frozen feeders at great prices. The more you buy, the cheaper they are.
Plus you won't have to go back to the evil pet store.
If there is anything the nonconformist hates worse than a conformist, it's another nonconformist who doesn't conform to the prevailing standard of nonconformity.