Didn't you take one of the ship models and then cut it in half to use as a shipwreck encounter location? (Maybe it was someone else but I thought it was you.)
DM, you should have a simple blog of where you show photos of you putting together various projects and then have them in play. Maybe give some tips on things you kitbash.
This thread needs more links to cardstock model locations as well as some clever person to find where WotC is hiding that archive of cardstock building PDF downloads . . .