If you are looking for good clipart then I'd recommend you take a look at,
http://www.vectorart.com - excellent affordable vector clipart that cuts really well.
http://www.doverpublications.com - image based clipart that needs vectorizing but still very inteesting designs.
If you register on the Dover site you get some free clipart every week and this week one of the pieces was a Merc SLR McLaren. I used Inkscape (Free from - http://www.inkscape.org/download.php) to vectorize the image and it went straight into VCarve Wizard.
See - http://www.doverpublications.com/sam...06/sample6.htm
I grabbed the Merc logo from - http://www.brandsoftheworld.com and added it to the design.
Below are some preview images of the car carved in different materials,
Happy New Year to everyone!
Tony Mac