Summary

V1: without the cut out around the buttons.
V2: with the cutout around the buttons.
V3: reduce the cavity size by 0.2mm (both height and width) to make it tighter for the remote. Otherwise it's the same as V2.

Files are created in onshape, you can make a copy and modify as you wish:
v1 link:
https://cad.onshape.com/documents/399f46bee194e7583cc03e89/w/6e202c9864142a3a291fddbf/e/6b73b2c512d3dc426ccdbcc8

v2 link:
https://cad.onshape.com/documents/a30771339df93a2800a4a5e0/w/aab0d6f38f7e5da733b3577d/e/ee75419c06d3f2a47f79891f

The Apply TV remote file is found on OnShape public domain, created by Erlend Topland
https://cad.onshape.com/documents/e2b0d84ae0a942429ccab378/w/9bcc2c34ec824b82994b4e67/e/3f2d5680d85a4ba096f8dd92