While searching the net for pictures of some ships to model for SH3, I came across this site that had pictures of torpedo and bomb damage done to mostly US warships during WWII. I know it's been awhile that someone was trying to create new damage textures in the mod forum. Maybe this will be of interest.
http://www.dcfp.navy.mil/cgi-bin/WarSummary.cgi
Happy hunting!