Help finding corner bracket for my closet swing door

i need to replace a corner bracket that pivots for a closet swing door (for about a dozen doors...)
currently it is that stanley 4212 metal bracket with an insert for it that says part no. 01-5264

sorry i have no picture - it is similar to the above pictured track wheel assembly, but it has a pivot point instead of a wheel ... and this bracket is placed at the top and bottom corners on the pivot side of the door panel (metal framed hardboard) while the opposite top and bottom corners just have the 4212 bracket with no insert - it just serves as a fixed corner brace.

do you have a replacement for this part?

thanks so much,
sally