I couldn't find these anywhere, so decided to design myself. 

This is a 26.6mm button designed for the Haute42 S13 & S16.

Printed with white Creality Hyper PLA. 

Printed on: Ender 3 V3 SE

No supports

No brim

20% infill

Honeycomb (so it can still have some light passthrough)

Please be aware the female stem for the cherry switches are quite small, so make sure your printer can print within these tolerances. 

Depending on if the stem has a circular retainer around the stem, you may have to sand material as needed depending on how close your printer can get to the files measurements. 

Print with the top of the button facedown on the print bed.

I'll be uploading a series of these buttons as I finish the whole set.