These are the ones I have found. I think the second may be a better arrangement because it provides better belt to pulley contact. But, I have questions about rigidity of the Davis design.

https://www.performanceonline.com/p...or-bracket-1955-62-chevy-235-6-cylinder/

https://davisspeedequipment.com/pro...y-power-steering-alternator-bracket-set/

Joe D.