Hi Oscar, sorry I've never seen any clear pics of the Seaquest! Even in the TV show it was normally very dimly lit. (One of the eventual turn-offs for me).
I have seen plastic model kits of the Seaquest. How accurate they are - who could say for sure? but they look right to me. Usually thes kits have line drawings at the back for painting guides and decal application.
If not I'd make my own drawings taken from the model and then enlarge them up. You might find you are the first to have a set of workable plans for the Seaquest. Then people might come nocking on your door for a copy.
Hope you don't give up on the project. It will be a most unusual model to own.