Your best bet will be to go into apple's System Preferences > Keyboard > Keyboard Shortcuts... > Modifier Keys > then find something you can use to remap a key you don't need to be the Globe key.
There are eight true modifier keys. Other keys can be treated like modifier keys.
Keys like control, alt, shift and GUI have both left and right variations. If they will let you remap right-control, alt, shift, etc, to the the Globe, that would be perfect. I've seen some people recommend remapping caps-lock but that is a useful key.
Number pad keys or function keys F13 through F24 would be available and nothing ever uses them.