Crane Composites transport truck trailer panels come in sheets big enough so only two or four sheets would be needed for most of our boats, and even come in a thicker, high impact textured surface called, "scuff panels".
FRP Panels by Crane Composites
Crane's Armortuf looks good as well;
http://www.cranecomposites.com/tr/liners.html
I'll be taking the teak off to deal with some soft core issues, but these panels are intriguing.