Added as a remix to keep it with the Delta Flyer 3d printer but I designed this myself.
Can be printed out of PLA or PETG
A threaded M3 heat set insert is installed, so it can be screwed into the door (via M3 screw).
I suggest using a flat head screw to clear the moving carriage when the door is closed.
The author remixed this model.
It is a own design that fits into the original door.