The kits from Boyce Aerospace are ALL 3D printed.
Rocketarium has started to include 3D printed nose cones, boat tails, and detailed scale parts for some of their kits.
Estes put out the Orbis bulk pack for educators. Tubes, chutes, and hardware for 12 rockets. Files are downloaded for the fin cans and nose cones, and printed on a 3D printer.
A current drawback is the micro ridges must be sanded down or filled. I anticipate that next generation printers will make this a thing of the past.
And what a boon for cloners! Someone just posted the files for a Maxi Pershing nose cone and fins over at the "other" forum. Makes it so easy.
So +1 on a new sub forum. Cheers.