(answering your PMs here instead)
I'm not 100% sure the story of how far he goes back with FX, but I think that's who we're both talking about. He's on Facebook but otherwise, even from the limited experience I had with him (I've purchased armor in the sketchy parking lot behind the McDonalds by Disneyland - IFYKYK), he's a very private person and I don't think he'd appreciate me giving out his contact info unfortunately.
He has stepped away from making armor, but over time, from my understanding FX morphed and became AM (Armor Masters). AM 4.5 armor is a much more refined fan sculpt and still available today through Dave's Darkside Depot (also on Facebook) - the molds or at least the distribution rights were transferred to Dave C. in Florida a few years back. If you're interested in that armor (thick and bright white), I would hit up Dave and not Dale. Any FX armor you find is likely to be yellow and brittle from age and they are no longer approvable with the Club due to their accuracy, but they absolutely hold a significant place in stormtrooper costuming history. Good luck!