Edges expansion

Now that it’s official that Edges is approaching end of life (sorry, no permalinks on Facebook…) I must hurry up go get one. Since it’s pretty big I’m thinking about maybe building a separate tiny rack just for Edges. In that case it will be very handy with MIDI… Which leads to the expansion.
But before that I want to know if it’s possible to get the expansion PCB somewhere. There must be some kind of prototype batch ordered and maybe some bords got lost?
What about panel design? Does anyone have something to share?