After reading Lenore’s blog post about the nixie-based font, I went looking for something similar with open font license.  No joy, unfortunately.

I did, however, find an OFL font that perhaps fills a different vacancy in the growing Hershey fonts constellation.  It looks rather like Courier, though it is said to be influenced by neon tube design (I must confess I don’t see any neon influence, however.)  It’s at https://fonts.google.com/specimen/Nixie+One

I’ve added this derivative as EMS Nixish and EMS Nixish Italic.  And documented both in the now-canonical style.  And here it is in dropbox as version 2.0.2:  https://www.dropbox.com/s/ve4qdcvda2utzbs/hersheydata%20v2_0_2.zip?dl=0