Old National hanging closet door with large plastic cog

A home owner from Minnesota says:
possibly from 1966

National inscribed along outer edge of closet facing surface of plastic cog

Sterling, Ill inscribed on closet facing edge of plastic cog

raise / lower and accompanying arrows inscribed on edge of closet facing edge of plastic cog
___________________

numbers on metal bracket

front 1-3/8" rear 3/4"
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A home owner from Minnesota says:
thought a better picture of the plastic cog would help
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Tom from SWISCO responded:

This is definitely an old part, but it reminds me of our more modern 23-024 and 23-025. Are the old wheels 7/8" diameter? If so, you may be able to get one of these to work as a replacement.

A home owner from Minnesota says:
It looks like they are a 1/16 shy of a full 3/4 in diameter would either of those suggestions still work? Should i measure the existing track to see if a newer wheel would fit?
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Tom from SWISCO responded:

That's cutting it a little close, but I still think these are our best options. I cannot guarantee that they'll work but I'm not sure what else will replace this old National part.

The only other option we have is a new bypass track kit like our 23-500, 23-501, 23-502, and 23-503. You would use these to replace your entire track and roller setup.

I'm sorry that we couldn't offer you a better option for this door.

A home owner from Minnesota says:
Ok, thank you. Last question this closet measures out to be less than four feet, I should be able to cut the track but would this cause any issues, would I be cutting off mounting holes in the track?
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Tom from SWISCO responded:

That is possible, and it does happen in my experience. You would have to drill new mounting holes for the shorter size.

A home owner from Minnesota says:
Thank you for all your feedback, I will order the whole set up right now. Many Thanks
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