[Goldmine]

there are several of them. this one in kaki bukit, not sure they hv what you want:

Check out 10pcs PVC Bi Fold Door Roller Guide - WHOLE SET *SHIP DAILY* for $12.00 - $15.00. Get it on Shopee now! https://shopee.sg/product/10214/33514415...33450681.9

Those 10 pcs one, I think are not suitable - size does not look appropriate. I think the set of 4 pcs are more suitable - the size (5cm,) durability - fit for door weight 10-15kg. Its best to buy physically front the store if they have a branch here.