Autozone carries it. I went out to Evapo-Rust's web site and used their search feature to locate a nearby store that carried it and out my way it's all Autozone. Car-heads love it for removing rust.
I found out about it when I went to my local Woodcraft and had a guy show me how to tune my newly aquired planes. He saw the rust and suggested Evapo-Rust. He said he never used it but heard lots of good things about it from his customers. It certainly worked like a charm!
`Casper