It's have to say for sure :( It could be done either way or even with sugar sheets. I don't know of any preprinted but certainly one could print it out themselves.
I believe the woodgrain effect has been hand-painted on that cake. Gorgeous work, for sure.
AI thought I posted that it was definetly hand painted, but I don't see my post! I have no doubt, though I suppose I could still be wrong:-)
AThanks for the responses! :) So cover the cake in light brown fondant then paint with a fine tip brush?