Dual Fill gas tank set up

[c502cid]

I'm searching for a product sold in the late 80's, early 90's called the Dual Fill made by Sagebrush Industries in Montana. Basically it let you fill both tanks at once on a 73-87 Chevy truck from either side of the truck. Suprprisingly, the company is still in business but hasn't made the product in years and doesn't have any hiding in the warehouse. I've called my connections at JC Whitney and LMC among others but no luck so far.

Anybody have one sitting around?