Premounted switch matrices… Black, White, Blue, Red, Yellow, Green, Grey, Etc, mounted in 4x4 configuration, with a 0.1" header pinout
http://www.smcelectronics.com/swkey.htm
And a huge macro keyboard…
http://www.smcelectronics.com/emod.htm (Good eye, SmashTV ;D)
Edit: Thanks, DrBunsen, I blame the clipboard ;D
Your second link is to the pots page, not a macro keyboard. I assume you’re talking about this one: (Images are links)
[img width=320 height=240]http://www.smcelectronics.com/EM10.JPG
Nice cabinet: The top section is slightly C=64 ish
[img width=320 height=240]http://www.smcelectronics.com/WNCABIN06.JPG
Judging by the images, these two go together.