Looks good. I was just thinking about this very thing for my station wagon. The interior pillar mouldings are always broken in the wagons. The only problem is, coming up with good ones to copy.
"Copying" the old parts is a problem, unless they are quite simple. No 3-D printer comes with a "3-D scanner", so someone with a lot of CAD experience will need to design the parts to be printed. If they are simple (no compound, or unknown curves), just X-Y-Z type parts, most anyone with some CAD training and the right software can design parts. Parts like interior moldings or most body parts are going to take a lot more skill and design expertise.