I don't have a IIc, and probably never will. I would also never scavenge Alps switches from a working system. I don't even do it with working keyboards. It is good to see somebody offering a solution to the vintage keyboard decimation that's taken place. Even if people are tearing these apart for Alps, I hope somebody is supplanting most good systems with some Matias replacements.
Curious that they offer backlighting (actual backlighting with Matias switches, finally? Impossible) but no caps designed for it.
I'm always for more commercial viability for Alps/Matias keyboards either way.