Does anyone have a good way to repair the door on the Hori RAP5 VLX Premium Hayabusa?

Does anyone have a good way to repair the door on the Hori RAP5 VLX Premium Hayabusa? One of the little notches on the case side broke off and the door doesn’t have anything to latch on to. This was so stupid. They make this expensive @$$ stick and then make the cable door cheap as all hell. Why wasn’t there an actual hinge installed here? Anyway, someone please let me know. Thanks.

First there no such thing as a Hori RAP5. I don’t know why people keep calling this as such.
Even the Front page of SRK gets this wrong.

as for your cable storage door on your stick, see if you can replace both notches with a metal bar about the same diameter as that knoch and slightly longer than the original door.
remove the other notch, drill holes for the rod, slide it though. You might have to take the stick apart and slide that rod though while the door is in place.
Secure the rod with some glue.

Possible to have a door 3-D printed?

I don’t see why not