Since July 2011, I've been working with Marla Mills to create original, unique acrylic painted pens. Both ball-point and fountain ink pens. I paint the tubes, Marla casts and turns them into working pens. Custom pen commissions are available upon request, send me an email.
Pen tubes are available for sale here: http://www.classicnib.com/blank-canvas-by-jessie-and-marla.html
Here is Marla's website: http://www.fineturnings.com/Site/Home.html