I designed this trunking cover cause mine where broken or doesn't fit good after moving the trunk and cannot find any source to buy it. It's a "copy" of the 50x80 Unex end cover.
This is intended to use for an UNEX Trunking 93 U23X but you maybe can use in other brands trunks if your size fits or adapt it. You have 2 holes for the screews to mount it on the trunk safely.

2022-03-14 Update: Uploaded an V2 version after using a digital caliper to measure the broken part.

Printing:
The better way to print it is with the face down to avoid using supports and achieve a better look. Video: https://youtu.be/Wu6roM9UmNk

Creality

No

0.2