According to the Ace Champion prints I've got the original gears were made by Fairfield Manufacturing Co. The 1.285 ratio required the following gears... 514713 and 514714.
I am currently content with my ratio (1.15) but decided to pick up a complete v-drive as a spare last year with the 1.04 ratio. My memory sucks but I think WellDigger00 has something other than the original gears in his Ace / Champion. His box is stamped with the 1.09 and I want to say when we did the turn and count his ratio matched what was stamped on the box.
I keep telling myself I need to call Oerlikon / Fairfield to inquire about the gears. It would be a real "hoot" if the part numbers I've got could actually be built again.