Im not very good at building but this might be good. I created a boat for archimedes ships mod and you can use it too!
(Screen shot) https://drive.google.com/file/d/0B39OaNL63kKIcFd3ZjlvM1Z6dTg/view?usp=sharing
Must have archimedes ships mod installed http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1289952-archimedes-ships-v1-7-banking-ships#download
And forge http://files.minecraftforge.net/
I downloaded them but download at your own risk
Thanks a rating would be very appreciated!