Shaft Extension Kit for Evinrude 9.5 hp Sportwin

[BurtWalker]

Does anyone know where I might find a shaft extension kit (to modify my 15 inch drive to 20 inches)for a 1973 Evinrude 9.5 hp Sportwin, Model 9322. I know that this extension kit has not been "available" from the manufacturer since 1994 but, hopefully I can find some dealer who would have the parts. The part number of this extension kit is 380022.