Oh, man...I just put one from Lowe's in my van. Bummer.
I wonder if, maybe, it wouldn't be better to buy a vintage one off of craigslist or eBay? I would have, but I was limited to specific dimensions...makes 'em a little harder to find.
Click here. Then click the "New Thread" icon:
This link may help. Also, it may be an urban legend, but I read recently that Quick Trip sells lighter fuel than the truck stops (explains why the QT gas is so cheap, comparatively).