Here is a used steel quickchange j-bar pinion mount.
Set 6 REM Polished Winters Performance Steel Quick Change Gear 10 Spline 8506
Set 16 REM Polished Winters Performance Steel Quick Change Gear 10 Spline 8516
Set 04A REM Polished Winters Performance Steel Quick Change Gear 10 Spline 8504A
Set 9 REM Polished Winters Performance Steel Quick Change Gear 10 Spline 8509
Set 39 REM Polished Winters Performance Steel Quick Change Gear 10 Spline 8539
Set 4A REM Polished Winters Performance Steel Quick Change Gear 10 Spline 8504A