My girlfriend painted me a simple 13 on the back of an old t-shirt I had: here's the pic (http://fodev.net/forum/index.php/topic,5472.msg154855.html#msg154855). I made the 3 in MS Paint (:D) because I couldn't find any font in which the number 3 looked like the one here:
(http://www.leonardboyarsky.com/images/3dmisc/VaultDweller.jpg)