deskthority

Perfect! Please send me some details as to how I should proceed. That would be awesome if I could get one (or even 3 in case others give out on me).

What are those like?

I'd feel bad depriving the world of a vintage keyboard by buying one on ebay just to get the domes out of it.

If you're up for mailing me one, I can definitely Paypal you for your trouble.

WOW! Alps Mount Square Slider Blue with Conductive Rubber Dome.

That's impressive! Many thanks!
I would love to find either a replacement dome or key switch. If anyone has one to spare, I'll be more than happy to provide compensation.
Now that I know what I'm looking for, I'll keep searching for ...

I have a keyboard from a really old MIDI/SMPTE device and all the keys work perfectly save for one.

The issue is within the key, the dome has lost its ability to spring back. It's not a regular dome, but one with a tiny conductive circle in the middle that bridges two contacts when pressed (this ...