My first attempt at a [Customizable Palm Pen Holder](https://www.thingiverse.com/thing:4178663) is up on Thingiverse. You can use Makerbot Customizer on that site (or more flexibly, from inside [OpenSCAD](https://www.openscad.org/) on a local machine) to customize all major dimensions plus the inscription.
My model’s a bit rough and has had no user testing.
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