aluminum bifold door hardware from the 50's

A home owner from Dexter, MI says:
I need the above-pictured part for residential aluminum bi-fold doors made in the 1950's. I would describe the part as the plate or pin that attaches to the door with a round nylon guide that fits into the track. I only need for two doors; i.e., one set of bi-fold doors. I hope someone can help and thanks in advance.
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Bob from SWISCO responded:

Take a look at our 23-020 and 21-214. Look these parts over and see if they're what you need.

23-020 : Bi-fold Bottom Guide Bracket, Roberts
Bi-fold Bottom Guide Bracket, Roberts
23-020
$5.62
VIEW >
21-214 : Bi-fold Top Guide Bracket, Roberts
Bi-fold Top Guide Bracket, Roberts
21-214
$4.09
VIEW >
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