Indeed, Akira has a good idea.
I've got a 3D scanner under construction, ETA for first scan next Wednesday. Maybe earlier. weather conditions are atrocious for construction right now (freezing point or lower).
I also have an A1200, caddy, I think. At least, I've got an A1200 awaiting resurrection, it should have a HD caddy in it.
Scanner is billed as accurate to 50 microns, so good enough for a 3D printer. I'll worry about hacking the resolution up later (it's a beautiful kit, Fabscan PI, open source, potentially hugely upgradable).
You can't print a full case out on 99% of all 3D printers, because they are too big for most build areas, but things like trapdoor covers and caddy's should not be a problem.