The 8mm Slimline Pro kit comes in both click pen and click pencil versions. Two tubes are required per kit.
https://www.pennstateind.com/store/PKPENXXCH.html
https://www.pennstateind.com/store/PKPCLXXCH.html
For additional information consult the penmaker's interest group in the Shapeways forum:
https://www.shapeways.com/forum/t/penmakers-and-3d-print-pen-making.80076/
Extra notes: This ARTG version may not have the best definition of the engraved text, depending on material choice. Your best bet for adding contrast is to color the engraved areas using extra fine permanent markers or paint using an extra fine brush. The best option is to instead use the lathe version of this design however that would require some machining to reduce the diameter of the tube to the final size.