I adapted a model from Thingiverse by ancanrom to my needs.
This filament guide is slim and can be printed very quickly.
I edited this model because I liked the look of the filament guide but had installed the Z-axis upgrade kit for my Ender 3 v2.
I included 4 versions depending if you want your filament guide to be looking towards the front or the back of your printer and also made a version with a top arch and the normal bottom arch.
In my Screenshot above i have the Top & Front version installed.

Happy printing :)