How to remember or apply Num Lock state based on which keyboard is connected?

I use my laptop on 2 different desks, both with different external keyboards. One of them I generally use with Num Lock on, the other with Num Lock off (, it's kinda weird but it's what I've got). Is there a way to: - Ideally, let the system remember a separate Num Lock state for each keyboard? - Or to simply apply the preferred state when the keyboard is plugged in or the system boots with the keyboard connected? I'm on an up-to-date Arch Linux with KDE.