Today I ordered 4 sets of flanges directly from Keysight that I hope are the correct ones.? I used their Find-a-Part tool to trace from the original HP part #'s, through replacements, obsoletes, and rebadging PN changes to find these.? Part numbers are below.
Flange kits for equipment that already has front handles:??
2U flanges only kit = 5063-9232
3U flanges only kit = 5063-9234
These are both still in production and can be ordered if not already in stock in Roseville.
They're new, so not cheap...but I need them badly enough to take a chance.? :( I will report back when they arrive....from Germany and Singapore (via California) hopefully in a couple of weeks.