Need pivot pin or locking piece to keep ni-fold door fixed

A home owner from Ojai, CA says:
We inherited a bifold door with all the wrong hardware. I found your item 23-214 2-wheeled roller and it works perfectly with the track. What I didn't order was the additional part needed to hold the fixed end of the bifold door in place. Standard hardware stores only carry something too narrow (see picture of sad horizontal wheel that chronically falls out, and other pic of our temporary fix to hold pivot point "in place".

What additional items do I need to order to fit this track and hold the fixed side of the bifold door in place?

Thank you!
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Paul from SWISCO responded:

We believe you have the discontinued Acme Series 2600 closest door. The top pivot bracket would be the 23-239 and the top spring loaded pivot pin would be #23-112.

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