The only place I would use would be these guys:
http://www.ecsautomotive.com/
They make EXACT duplicates of original decals and actually, if you have a good original of something they dont have, they do will supply you with a free duplicate just for using your decal. (You get your original back, too) They did that for me with my 1972 455HO emissions decal. It was absolutely exact, when compared to the crap, not even close, alleged replica I got from one of the resto supply houses.
Here is the link to my decal:
https://www.yenko.net/ubbthreads/show.../fpart/13/vc/1
And yes, they now make exact replicas of the blue door jam decal as well. (I got one for my T/A)
They also replicated the original dealer bumper decal after we found an original and photographed it for them.
https://www.yenko.net/ubbthreads/showflat...e=0&fpart=3