They had several at the Big Lots! in San Francisco on Mission Street in the "automotive" section.
The closest thing I could find on the 'net was
$51.05 , but their directions say dilute 4:1 for 200 square feet, but the bottle at Big Lots! just says it covers 400 square feet without diluting.
They're already on eBay, with people trying to get $29.99 but with little success.