Here in eastern WA, Maverik stations offer it. Some other stations also, but it's hit and miss on the locations.
Try a search in your area, maybe?
Chip
'Rusto-Mod'
'51 Chevy 3600 5 window | C4 Corvette front/rear suspension & drivetrain | everything else looks old and stock
'92 GMC Sonoma GT #15 of 806
'91 GMC Sonoma GT Extended cab 1 of 1
Trucks, Trucks.....and more Trucks | 
