Spare rollers for curved sliding shower doors

[rodgdodg]

I am trying to locate an outlet to purchase spare double rollers for our curved sliding shower doors. The shower cubicle doesn't have a trade name or name for the cubicle, just the codes GQB8080/ GQB9090/ GQB9076/ GQB1080/ GQB1280/ GQB1290. The wheels for the lower roller are spring loaded and are 6mm wide with a diameter of 25mm. The width of the shower door glass is 6mm and the height from the bottom of the wheel to the top of the spring is 5cm. Any ideas?

 

[rpm]

Pull up a chair, a bottle and a glass and search through +5k of items on fleabay,. Shower rollers and sliders (I think).

 

[Mrb]

Do you have a picture of the rollers?