I'm looking for the same thing. I'm thinking Henning's Trains.
I have a "like new" almost perfect AF 3300 & 3301 except the rods crumbled & needs wheels & new wiring from age. I have a set of the cast rods but someone with all of the correct rivets to assemble them. I too afraid if I start working on it, I'll scratch it up. The glossy black and green stripe look new. This is the 1st version with high gloss black, visor over headlight, red weight in the cab, smaller crimped style wheels etc. It's beautiful! I just wish I had the box.
So, I'm asking for advise from here too. I have been planning on sending to Harry Henning.