I can't speak to the true movie props or other replicas.
I actually used a thick quality paper for mine and pressed it between contact paper. If I ever build a future version I may try to cut thin plastic discs, but I don't know. While it isn't close-up quality, the nice thing about my original design is that I could improve the design and allow discs/colors to be swapped out.
As it stands now, the top is
(disc rings)
(blue gel film)
(Joined EL-sheets)
(frisbee base)
In theory I could join the disc and gel as a single unit and swap them out as needed. If I can figure out a clean way to hook up the EL tape on the side (which is also covered by blue gel film), I could swap out colors/patterns for the same disc.
Not sure it is worth the hassle, but it is fun to design on paper.