Where can you find a roller/sliding door fitting for a lafa?

[Inger_1]

In the picture, you see a white door on the barn. Don't have a better picture right now... To open the door, you slide it to the side, with rollers that run in a track above the door.
On the opposite side, there is a similar door that has collapsed. The attachment screws/nuts that the rollers were mounted with on the door have rusted away.
I'm wondering if anyone knows where to find rollers that can handle such a large/heavy door?
I'm also wondering if it would be easier to open/slide the door to the side if there are more than 2 rollers?
Would it be more stable if the attachment on the roller goes far down on the door?

 

[RoTe]

Which picture?

 

[Inger_1]

Which image?

Thank you for pointing out that the image wasn't included; I'm new to the forum.....still learning ff

 

[Totte_S]

At Lantmännen, Agro or similar, they definitely have sliding door fittings. I think you can search for Hendersson, which is a commonly established brand.

 

[Inger_1]

At Lantmännen, Agro, or similar places, they definitely have sliding door fittings. I think you can search for Hendersson, which is a commonly established brand.

Thanks! I will check that out!