Based on Creality Ender 3 V2 Belt Tensioner Cover by bspoel.

Changes compared to the original:

Thinner - The covers are a bit thinner.

Rectangular - The covers have a bit more rectangluar shape.

X and Y differ - The length of the inside rings are different for X (24.70mm) and Y (26.00mm).

The inside ring has a slight angle if yours dont fit like mine.