I'm doing FIVE free UTAUloid designs for voicebanks without one! I can do boxart art or just a reference sheet. Here's some examples of my UTAUloid designs:
http://sta.sh/0uog6xwktyy
http://sta.sh/01h0irudzsrz
http://sta.sh/0uog6xwktyy
http://sta.sh/01h0irudzsrz