The original logo of the film?
From The Lost Media Wiki
Cordial greetings, ummm... I found one movie-logo of Down and under in a blog of a person who worked in the film... I don't know if this logo was the final or one of the development... I hope I have helped, cordial greetings :)
-Down and under logo: http://2.bp.blogspot.com/-b_FLrhaqbnw/TwtwsOH1cfI/AAAAAAAAGO8/EOkrjaLUx_I/s1600/Down%252BUnder-06_3DCD_Nuv1DRTb.jpg
-The blog with the experience of the person who worked in the film: http://3dconceptualdesigner.blogspot.com/2012/01/project-review-kangaroo-jack-2003-aka.html