While checking out new designs on Youmagine, I found a 3d printable copy of vintage omnidirectional Harman Kardon HK-25 loudspeakers. Each speaker consists of a top and bottom part. The bottom is designed to hold a 50mm "metallic" driver speaker that can be found in many cheap "iPod" speaker docks.
This will probably bi my next 3d print for a small home sound system.
Here is the link to Youmagine where you can find the files:
Speakers were designed by Jason J. Gullickson: https://www.youmagine.com/jjg
It makes me wonder what is the copyright law on industrial design?