Still waiting for something like this from Moog. Or a full on Memory Moog re-issue. It is going to happen some day I am sure. The time is right for something like this. It will cost you an arm and a leg I am afraid though.
The story goes:
"It's the prototype for the Moog SL8 (1983). The story goes, Moog brought this to NAMM 83 as an 8 voice polyphonic synth, a follow up to the Memory Moog (which btw has the fattest Osc's I might have ever heard). They brought the cards for the SL8 to NAMM in a 'cardboard box' and this was placed below the SL8 for performance during NAMM. After NAMM the cardboard box containing the cards was lost or misplaced and all the remains is the body. The PolyMoog can be a nightmare, but this is due to the body warping. The plastic container was reinforced on certain later revs (If memory serves correct), but early models suffer a twisting frame and thus damage to the cards. We have a PolyMoog in the collection. I could post a pic on a later date of it. I use the Memory Moog as a go to, the PolyMoog doesn't get as much use as it should."
"Yes. I am the Technical Director of the Audities Foundation. The purpose of the collection is to make sound and art with sonic artifacts This is one of the rarest synths around, but unfortunately lost to time."
via user from Moog Fan Club