National Bifold Door Parts needed

A home owner from Cordele, GA says:
What I believe I need are the pivot guides and guide pins for National Bifold Doors louvered metal doors. They both appear to be around 4 2/2 inches long. The pivot guides appear 1/4 inch wide while the guide pins appear maybe 3/16 inches wide (or vice versa, the guides that slide are the smaller diameter). Any help would be appreciated. Thanks
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Tom from SWISCO responded:

Thanks for contacting us. It's tough to tell exactly what you have while your pins are still installed. I can't make out the style of the nylon cap that goes in the frame, as it's obscured. That said we do have a couple National brand pins. See our 21-072 to start. This looks similar to the pins I see in your photos and it is 1/4" in diameter. Could this be the replacement you're looking for?

We don't have a National brand pin that's 3/16". You may want to double check that dimension. The other two National pins we have are our 21-046 and 21-041 . Look these over and see what you think. 

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