This is an approximation of the original eKey Uno Mounting Plate.

I printed it with PETG and used supports under the hole in the middle and under the clip. I used PETG as it is more durable than PLA and more ductile which becomes important for the clip as well as for the long screw-in cylinders. With PLA I broke it several times during the design process (maybe it was not yet perfectly in the dimensions within that process but I wanted to have more ductility with PETG).