Stuart,
Thanks for the compliment. I can't recall for sure where I did get the gas pumps from but it may have been Exoto or The Franklin Mint. I also have a couple of other collector catalogs that have them listed. All the boxes say are Gearbox Collectibles made with permission of the Wayne Gas Pump Company.
I just found the place I got the pumps from and it is Gearbox. They are very heavy and were much better made than the ones a friend got from one of the mints. Here is the site.
http://www.gearboxtoys.com/GBgaspump0.html
Ron