Just that question - I was able to find ones on the Big List of Bonuses (atlas-games.com/pdf_storage/ ... yShape.pdf) for every TeFo except Creo - in context, I'm creating my magus' Talisman, and am writing up the list of inlays I wanted to have on it. (It's a medium-sized shield. He usually walks around with it strapped to his back. yeah, I know, not exactly subtle. He occasionally uses it as a hover-platform, and rides around on it.)
I know I can just "discuss it with the troupe" to see if it's OK to create a new form/material bonus, or I could use Alchemy(?) in-game to create a new one - so mainly this is just a check to see if I missed something.
(Also - does anyone have a good idea for a wood or stone that would be good for Creo, if there isn't a canon one?)
I noticed this as well and was about to ask the same question. I was thinking of a Bee. Since bees are just created out of the carcases of dead animals. Could do flies and maggots as well but bees look better.