There's one in Tucson his name is Cuz,most if not all the bike shop's know him (he's been doing it there for 25yrs. or more)if you get down that way ask around he's well known.
I wouldn't waste much time trying to buy Amsoil when you can zip on down to auto zone, and get as much Mobil 1 as you want. No waiting and no shipping charges. Won't make any difference to your bike which one you use.,,
Become one yourself. It only costs $20 or $30 a year depending on what level you want to be. That's what most of us in here do that run Amsoil. Then your friends can get you to buy them case's of it at cost. Or go in together with a few friends and split the dealer cost.