Designed from scratch in a very non-optimal way. Made it for easier printing and added an optional rigidity addon. Print with tree support and 100% infill. Feel free to modify blender file. And please don't check topology in it T_T

No DRM, no unnecessary geometry - printing is 30% faster than alternative designs with DRM.
When adjusting blend files for your door thickness add extra 3-5mm between the moving part end and the back wall in order to allow the moving part to actually move up. The lower the door - the more space you need to add.

Blocker part is lifted up by 3cm, but you can adjust the file pretty easily, then merge and print.
I recommend putting something onto the end of the blocker part to minimize scratching of the door itself. You can use the small door part I added to this thing.

With 3 walls in the moving thing (use arachne generator for variable wall thickness) it can hold a 3m tall glass door just fine.

Post-Printing

Mount with double sided adhesive

Add it to the middle of each bottom side and you're good. Don't be greedy with the front part. It's more essential than the back part.
Also use heavy door part if your door is heavy. For hollow doors smaller part will be enough, but for heavier adhesive will shift and disconnect.

How I Designed This

Seen a different model and replicated the base.