Here is a used set of 10 spline quick change gears. They are set 13. They are 5.14 with a 4.11 ratio ring and pinion and 6.08 ratio with a 4.86 ring and pinion. I believe these have never been used.
Quick Change Gears Set 22 19/25 Tooth 5.41/6.39 Ratio QUARTER MASTER WINTERS
QuarterMaster Quick Change Gears Set 10 20/27 Tooth 5.55/6.56 Ratio Winters
Quick Change Gears Set 26 27/29 Tooth 4.42/5.22 Ratio WINTERS QUARTERMASTER
Performance Engineering & Mfg 61011 Standard Quick Change Gears - Set 11 NEW
Performance Engineering & Mfg 61028 Standard Quick Change Gears - Set 28 NEW
Quick Change Gears Set 15C 17/18 Tooth 4.35/5.15 Ratio WINTERS QUARTERMASTER