Melvyn, I couldnt get your link to work properly. Looks to me like their link needs updating.
I found a couple others.
The place to order. http://jtiair.com/autogas.htm
some background info. http://www.autofuelstc.com/autofuelstc/pa/Start_Here.html
some interesting info from the JTI website.
Use auto gas in your helicopter to gain fuel savings and increase engine power. The STC pays for itself in less than 50 hours of operation on autogas. And you don't have to make any engine modifications to eligible models (Robinson R22 HP, Alpha, Beta, Mariner, R22 Beta II, R44 Astro, Clipper, Raven I; and Schweizer 269C-1).
Wayne Mulgrew used our STC and 91-octane automotive gasoline in his Robinson R22 to set an FAI altitude record of over 19,000 feet.
Click here to order your STC today, and see the fuel savings and increased engine power and efficiency in your helicopter.
Anyone interested in trying to beat 19K' in their R-22????