You could try out Chinese U-47's SH3 Warship Mod.
I have not used this mod at all but IIRC it does give you playable surface warships including the Bismarck. The thread for it is here:
http://www.subsim.com/radioroom/showthread.php?t=146587
You can read through it all, but I'm guessing some of the links in the earliest pages are dead... go to the last page and then bounce yourself back a bit to where the 2010 posts start, there should be a more recent link in there plus instructions for using the mod.
Again, I have never used this so can't provide any first-hand info. But it does appear people are still using it so if you post questions at the end of that thread you may get a better response. Good luck!