Buchmin Industries Mirrored Bi-fold Door

A handy person from Hawaii says:
Above is a picture of the lower pin slider for the Buchmin Industries mirrored bi-fold door.
Thumbnail of the uploaded file named IMG_20210911_110703.jpg
A handy person from Hawaii says:
I would like to purchase four parts.
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Paul from SWISCO responded:

Thank you for your patience during our busy season. Your nylon roller guide looks like our 21-174 that fits into a track like the 21-452. Look these over and compare our dimensions to yours to see if these could be what you need. 

21-174 : Roll Guide
Roll Guide
21-174
$1.20
VIEW >
21-450 : 24
24" Low Profile Track Assembly
21-450
$10.77
VIEW >
21-452 : 36
36" Low Profile Track Assembly
21-452
$13.34
VIEW >
21-455 : 72
72" Low Profile Track Assembly
21-455
$24.42
VIEW >
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