Part needed for sliding closet doors

A home owner from USA says:
It appears you might have this part

It is from a 1960 built home for sliding closet doors

Hope U can help me

Phil
User submitted photos of closet door hardware.
Profile picture of Paul
Paul from SWISCO responded:
I believe you have flat 3/4" nylon wheels on your door brackets. Can you confirm? If so, they no longer make double roller assemblies like yours, just the single roller type like our 23-009 and 23-010. Could you still get these to work? See what you think.
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