Just found This bracket. Says it is for cast iron water pumps and Saginaw pumps for A-bodies 67-69. I will need to find out more to see if This is the missing link “bracket” that will bridge the gap to go from the rare unsupported TRW pump to get to the prolific Saginaw pump
https://bergmanautocraft.com/product/
power-steering-pump-bracket-saginaw-type-67-69-small-block/