An IC pen is completely made out of printed parts, aside from the pen insert. To make it work, use the inside of the M10 Clic pen. Use both the filling and the spring.
This is the standard design of the IC pen which you can fit with your logo and text. If you might want another configuration, for example two logos, or text on both sides. Please send me an email and I can create your custom design.
Colors might be different from the picture, as my iPhone seems not to be able to capture the colors exactly.