The older HP gear test gear feet were black, part number 5060-0767. They had a metal push pin to allow side in installation or removal--found on 141T or similarly aged HP gear.
They are as rare as hen's teeth--few I have recently found were quite costly.
The part numbers you mentioned will bring up images using Google search.? One looks like a screw mounted rear apron foot.? The other looks like a snap in gray bottom foot.
Peter
