Myself and my pal, Raymond Estrada have designed a simplistic VR1 Pen+Stylus. It is designed for the Hi-Tec-C refill with a 6 mm conductive rubber tip. VR1 comes with dual magnetic caps.
Currently this project is live on Kickstarter. Funding ends on Jan 26, 2013.
At 9.5 mm outer diameter and 20g, the T-6061 grade aluminum VR1 sits in hand comfortably. Diametrically magnetized Neodymium magnets are attached at the end of each cap allowing cap to cap attachment or any magnetic surface, eliminating the chance of misplacing caps during use. Finish: Bead blast and anodized in black, silver and red. Length from pen tip to stylus tip is 131mm. 6mm diameter conductive rubber stylus tip functions effortlessly with touchscreen devices. Pilot G-2 and Uniball Signo refills also fit well in VR1.