I'm down here in LA today and went by Savoy Music Center. Marc has a stack of DVDs that contain all 5 episodes of the DIY feature on him building an accordion. He is not allowed to sell them, but he can give them away. If you didn't get them recorded, you might be able to sweet talk Marc or Tina to send one to you if you send them a stamped, self-addressed mailer. You might want to call them first, however. This plan is my assumption, not their directions.
PS. I had wondered what happened to the accordion he made for DIY. They ended up buying it and (I bet) putting it up on a mantle or in a trophy case (just as Marc feared).
PSS: Marc's accordions are going for $1,800 now and they are producing the instruments to be delivered in Mar/Apr.