An old thread to be sure, but I am curious to know what became of this project? I have, since this post, seen pictures of the lightweight Meteor drumhead in the TRRA Historical society publication on The Meteor. I would love to buy/ make an illuminated lightweight (rectangular) drumhead in HO, I would also like to build an illuminated sign version for the train room. May not have been prototypical, but it would be cool for the ambiance of the train room.
At one time, the Museum of Transportation in St Louis had a bunch of the glass from signs that they got from the company who did the glass artwork. Since Molly is gone, I don't know who to tell you to contact.