deck plans?

hi everyone,

for my final thesis at university in hamburg/germany i just started to design a mega yacht (aprox. 300ft).
we just started research a few weeks ago and are now looking for deck plans just to know what the "usual" motoryacht of that size looks like.
i know its pretty hard to get plans and everything is mostly kept secret by the ship yards but does anyone have an idea where to find something like that online or in a book?

thanks a lot for your help.