I need some help finding a pen kit that will take a specific ink refill cartridge. Here is the story.
I am a biologist, which means that I use pens in all sorts of strange weather and write on strange stuff (the most regular being wet paper). There is a brand of paper and wrting products by the name of Rite-in-the-Rain that I use regularly because it writes on just about anything, in any condition. Their pens are a basic clicker type that use a pressurized ink cartridge that is 3.5 inches long (see the included picture).
I would like find a pen kit that would use this cartridge so I can make some nice pens for me and my biologist friends. Does anyone have any suggestions?