Broken wheel assembly
I'm sorry to say that I'm not familiar with the ShoLume brand, so I'm not sure what roller you need for this door, exactly. I can only really tell you that this door looks pretty old, so right now I'm uncertain if we're going to have a good match. I'll try my best.
To start, in addition to the photo you already provided, I'd additionally like a photo that shows the roller from the back end and another from the top. I'd also like you to measure the width and height of the housing and write down what you get for me; please make sure to write it down, as a photo of a tape measure won't be helpful in this case.
From there, I'll see if there is a modern assembly that can work for this older application.