I created a rail mount for the Solum EPaper Tags that can be mounted for small, wireless displays. I use 3M Command strips to mount them so I haven't created any holes for screws. Feel free to add them to the model if you need. I have included the Fusion 360 parametric files to make things easier to modify if needed. Adjust the OverallLength for different tag sizes. You can also de-select the angled “ramp” body if you just want a flat mount.

I use an Open EPaper access point with Home Assistant to manage my tags. I got my tags here