Here's some great research on colors and paints:
http://uboatcolours.mysite.wanadoo-members.co.uk/index.jhtml
I have some Humbrol equivalents I matched at:
http://www.rocketcopy.biz/models/uboat/paint.shtml
AMP - Accurate Model Parts
Fabric Flags, AM Uboat Goodies & More
http://amp.rokket.biz/