Bottom Rollers for Sliding Glass Door

The photo of the original label attached shows the manufacturer as Binnings Building Products; and the "Series" as 100/150. Additionally it also shows "Code 15-1 - "HP" Series."
We are desperately searching for a set of these to replace the original ones as they can no longer be adjusted to keep the slider plumb and level in the track. There's an open gap at the bottom where the door should meet the side.