Here is what someone did two years ago:
http://www.vehicross.info/forums/showthread.php?t=22554

I prefer Ty's method better, I think:
http://www.vehicross.info/forums/showthread.php?t=22424

However, http://www.lizardskin.com/ is the best option, IMO.
The Powerblock Trucks episode is the best one to watch - http://www.lizardskin.com/as-seen-on.html

Lizardskin followed by a cleaned carpet or rubber mat like Bob Barker's, to me, is the best way to go.