Hi Shane,
Thanks for sharing your "attic", great stuff! I thought you might be interested to know that I have a promotional VHS tape from Arrow Dynamics - you may already have it? It showcases around 12 of their coasters (from memory (since I havent watched it in a long time as I dont have a VHS player) it shows Drachen Fire, Big Bad Wolf, Loch Ness, Gemini, Shockwave, Great American Scream Machine, Magnum XL200, Adventure Express, Vortex, Anaconda, The Ninja, The Steel Phantom, etc). It was given to me when I was around 13yo on a visit to a roller coaster manufacturer here in Melbourne, Australia. I've also got heaps of other Arrow Dynamix brochures too (like the "we've been around" one you have).
I'm happy to get more info for you if you're interested?
Cheers,
Evan