Other than their web site por15.com , try looking
in your yellow pages under automotive paints, I found a
couple of local stores here in ohio that carry it. These are
the stores, like sherwin williams auto paints, etc. Also some
NAPA's can order it for you. I didn't find any price advantage
though. I guess ya just have to weigh the shipping cost vs. paying
local sales tax. I bought about a quart of the stuff and it cost me
around $40.00 total. But, A quart went a long way in to treating
almost all the small rust spots on my frame. One suggestion.
DO NOT PAINT OUT OF THE CAN. It gets contaminated and
starts to harden up real fast. Por15 offers it in packages of
six little cans, which is great because you only need to use a
little at a time and it stays fresh. WEAR PROTECTIVE GLOVES!
It gets all over.