I found a new web site that has replacement keys for Mono/Polys
(same as Poly-61s and PolySix's) as well as knobs, semiconductors,
and miscellaneous parts that vary depending on what's available. I
had the hardest time finding it using Google, so I tried search.com,
searched for "Mono-Poly", and used the "search within these results"
feature to look for "keys". (Looking for "replacement keys" using
this strategy didn't work.) Apparently I was his first customer; he
gave me a nice discount on the keys I've been looking for since I
posted my first message months ago, and he threw in the springs at
no charge. He accepts PayPal as well as the other usual payment
options. The web link is:
http://cu.imt.net/~sounddoctorin/synthtec/korg/monopoly.htmHe also has parts in stock for various other analog synths, is very
well versed in the technologies of monophonic synths, and has
several vintage analog synths for sale including a Mono-Poly! I
hope this information is useful for those of you who have been
combing ebay for replacement knobs and keys.
Good luck!
Joe