Prevents the rattling noise I experienced since the plexiglass door is too soft and did not close fully. If you do not have this issue, just ignore this project.
Print two of them, glue two magnets size 8x3mm into each of them. Attach some sticky tape and apply them to the notches at top and bottom of the door. The design is self centering.
If you have no fitting magnets - the FreeCAD sketch is attached to adjust it to whatever you have available.
The author marked this model as their own original creation.