F13 to F24 key support?

[>me bee]

I have a mouse with macro buttons. I tend to bind those buttons to the extra function keys, starting from F13, mostly because no game will ever use these keys for anything and because it's not available on any (modern) keyboard.
However the game doesn't recognize F13 and beyond.

Any chance that support for these can be added? (even though Unity only supports up to F15, apparently. lol)

i know i can just have these buttons fire something like numpad keys but i would really like to bind it to keys that definitely do not exist on my keyboard