I have a Kickstarter project running, called the 'Tactical Marker' pen. In addition to printing, I also have a little machine shop, too. If this post is not allowed, I won't be offended if removed.
Maybe not for everybody, but maybe some

In addition to the Sharpie use, the Tactical Marker also has an option to use the Pilot G2 ink refill.
The ‘Tactical Marker’ is also available in “non-sparking’ Aluminum-Bronze, for use in high risk work environments!
Check out the 'Tactical Marker' project
https://www.kickstarter.com/projects/179537728/tactical-marker-pen