Having black anodized 2020 profiles for my MK4 enclosure I close the gaps (for cables, for dirt, for debris) with an orange TPU profile.
The attached stl file has only a certain length of maybe 150mm, in your slicer you should be able to strtch it to the length you can print.
Tip: I printed them with PrintSettings option → Complete individual objects. I got only 5 profiles done per print on my V2.4 (350) but completing before starting the next profile keeps your stringing rate down to max. 1 string per printed profile. Otherwise you may run into a spider net. Bear this in mind.
If you like, explore my other Printables: https://www.printables.com/de/@Tritschi
The author marked this model as their own original creation.