MOTM

i saw an old arp modular at someone's house recently that, instead of jacks,
it had dozens of tiny sliding switches that formed a huge matrix grid. each
position made a connection when the slider was moved into one of its 10 or
so locations.

this is supercool BECAUSE instead of plugging in patchcords for desired
routings, one could flip a bunch of switches, and in the process, flip some
switches accidentally and stumble upon lots of new unintended sounds! very
cool. is there an interface like this that i could DIY for the MOTM?

BTW he said he bought it at a Lucas' company clearance sale in california
and that it was used on the soundtracks for close encounters and star wars.
i don't know the model number and cannot find any info about it on the net.

mark in providence, ri