My model uses the original hanger but has been altered to provide two points of contact with the outside of the reel, rather than use the central hole, which prevented the use of vacuum bags and easy removal/addition.
I built my version using a 3 m long 20mm conduit, so lots of holders from 1 conduit, but the joining pieces could easily be printed, it's just a 6" long tube.
I have split the part in 2 due to the size of my 3d printing bed. they are joined together with a rivet and glue and seem very secure. I also include a full version for those with larger printer beds. I also glue the conduit in.
The author remixed this model.

I took @WesYarber's design and wanted to store more filament and have it more easily accessed.