Ok, We have drawers in the kitchen (and in alot of other places) in the house that have almost no clearance on the side. The drawer box is 1/4 in less than the opening, so I have 1/8 on each side. These all have tracks ABOVE the drawer and a little wheel on the back of the drawer box that goes in that track ABOVE the drawer.

SOOO, that hardware is failing in a number of our most heavily used drawers. I want to replace that hardware....

BUT, essentially everything I can find is side mount and requires 1/2 inch each side clearance.

Is there new replacement hardware that is narrow clearance or no clearance on the sides? I can't find this top rail / wheel hardware anywhere that I have searched, but I'm not at all sure what to call it.

ANy help would be appreciated...