Peter Yanczer's website is archived under the ETF web site. His page on building a nipkow disk is at
http://www.earlytelevision.org/Yanczer/nipkow_disk.html
There are some Nipkow Disk 3D printer STL files on Thingverse. Most under $400 3D printers are limited to about 7X7X7 inches. My cheap 3D printer is limited to about a 7 inch circle.
https://www.thingiverse.com/thing:359858
https://www.thingiverse.com/thing:2701005
https://www.thingiverse.com/thing:2411633
https://www.thingiverse.com/thing:2414716
https://www.thingiverse.com/thing:66687
There are free programs for making and editing STL files such as
https://www.sketchup.com/products/sketchup-free
http://www.meshlab.net/#download
You can download a PC version of Sketchup which is good for 30 days trial or use the online version
I think there are some programs which can convert STL files to CAD files