Jeremy_S, that is GENIUS! Off to Home depot I go!
And Sugru sounds amazing!!! I wonder if it can be used to make an ergonomic oblique holder? Let's try it!
It is perfect for making an uncomfortable holder into an ergonomic one. It comes out of the packet the consistency of a dry-ish clay and you mold it then let it set. It cures into a hard, silicon rubber that is cold and heat proof, and sticks pretty much anything to anything else. Check out the web site and there are a gazillion cool hacks that people have done with it.
You can even texture it and mix colors.
I would try it on an experimental holder first, until you get the hang of how to handle it, but all you arty people on here should have no trouble doing some cool things with it.