what are they? like dvd's opnly biggerr?
i once had some discs for an Optigon - an organ-like
(you know--key borad thingie...not bady part)
unstrument which like a player piano used discs
for automatic playing...

http://www.optigan.com/
http://www.optigan.com/quest.html

i know this is total thread creep
and i am a creep for being such
but i once came upong some of these
discs...like actate discs with black
spiral "groove" painted on....and the
instrument was at the salvation army.

I hope the discs you are talking about find a good home!