I would like a spare set also. I doubt you will ever be able to find pieces like those. It would have been nice if Dodge and American Sunroof Company would have released the engineering drawings for the convertible parts since they have been out of production for 30 years.
I've often thought about having parts 3D scanned so things could be 3D printed in the future when I need them but never get around to looking into it.
Have you guys found the beltline moldings for the outside bottom window seals or modified a standard set to work?