According to both Lorne Peterson AND Steve Gawley, the model is not in the finished film. Whether it was filmed and cut or never filmed, I can't comment, but this story was confirmed to me by both people...and not recently. I was first told the story in 1987/88, when I first worked in the archives--4-5 years after Jedi.
I know these guys sniffed a lot of glue (myself included), but their long term memory was pretty good.
--Don (another source) Bies