I wanted the NuPhy branded wrist rest but they were sold out for quite a while, so I thought about printing it! Very happy with the outcome.
Its to be printed as two parts unless you have a large enough bed to print all in one piece, 300x300 or larger.

Once you print the pieces you can use light grit sand paper to get rid of any stringing from the seams and then glue the two peices together.

This is the work of InaudibleWhispers from Printables. I couldn't find anything on Makerworld so I sliced and tested these files and am sharing for everyone else. This is NOT my work.