The attached files are compiled for linux x86-64 (amd64), to install on a linux machine:
curl -LsfSO --output-dir /usr/local/bin https://github.com/rustbox/hex2bin/releases/download/v2.5.1/hex2bin
curl -LsfSO --output-dir /usr/local/bin https://github.com/rustbox/hex2bin/releases/download/v2.5.1/mot2bin
chmod +x /usr/local/bin/{hex,mot}2bin(assuming /usr/local/bin is in your PATH and writable by you. if not, try saving them to /tmp and using sudo cp to move them into the right place)
To install the man page, try:
curl -LsfSO --output-dir /usr/local/man/man1 https://github.com/rustbox/hex2bin/releases/download/v2.5.1/hex2bin.1
ln /usr/local/man/man1/{hex2bin.1,mot2bin.1}