Thomas E. Lowe is a busy man. In additon to owning Auto World and recently resurrecting the Johnny Lightning brand, his company, Round2, has also brought back Racing Champions diecast collectibles. While I understand new castings are in the works, Racing Champions Mint brings back some of our old favorites. I found my red 1960 Chevy Impala at a WalMart, but the cars are also available at Target, ToysRUs and Meijer (according to the very minimal Racing Champions website).
UPDATE: I recently found the blue variation at Target (see below).