Reccomend printing with organic supports at 0.2 layer height with 0.4 nozzle. If you want the same fuzzy skin texture for the grip and the logo on the back like in the picture then try using the .3mf file below, though bare in mind this was made for my Prusa Mini.
Or you can add the texture manually with modifiers in your slicer, and add the logo using the svg file below.
update: I printed mine in PLA, but I've now had one of the tabs snap off. On reflection, I think these would be stronger if printed in PETG.
This design is based on the frame from my other 8bitdo micro handle design: https://www.printables.com/model/749279-8bitdo-micro-one-handed-controller-handle-reversib
The author marked this model as their own original creation.