Chosen Solution
The plastic wheel from a sliding door of a wooden wardrobe has broken out, just a piece. I can’t find the single spare part, is there any way to fix it?
Can’t say for sure, but I expect you can find a replacement assembly at a good hardware store. If they don’t have a replacement, you may need to replace the entire slider system. Not a big deal, more trouble than cost.
I doubt it can be fixed