Replacement hardware for 1960 bi-fold door

A quick learner from USA says:
Hello
We are refurbishing these solid wood bifold doors in our MidMon home, and cannot find any rolling top guidse (3/4" or 5/8" wheels) to match the existing system which I do not want to completely replace if at all possible. Two of the four top guides are missing
I have combed the internet and cannot find any top guides or swivel point fixtures that attach to the side of the door. All seem to screw into the top. Any ideas?
Many thanks - I really appreciate any help, and appreciate your time.
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Casey from SWISCO responded:

Hello,

Unfortunately, we do not carry a replacement for this roller and due to this age, I'm not sure you'll be able to find a match. Our best replacement option would be one of the hardware kits that we've associated for you. Take a look and see if you think that one of them might work for you. Thank you!

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