It is not a stupid question, but the most ethical way to get the deck you want would be to take a sawzall to the boat you have, remove the deck and put on your own. Either that or contact the manufacturer to see if they will sell you just the hull. The designer put a lot of work into creating the hull shape, if you like it that well, you should give his work the respect it is due and buy what you want from him. It is the fair and honorable thing to do.

: ................Okay....asbestos flame suit is on.......here
: goes......so...you've got this production boat who's hull you absolutely
: adore, but the entire deck / cockpit just doesn't suit you. You'd like it
: to be lower....less volume etc. etc. COULD YOU
: ????..........flinch.........wrap the whole boat in stretchy saran
: wrap.........turn it upside down on some sawhorses, and start laying on
: glass ???? Kind of using the existing boat as a reverse mold. When you're
: done with this, you crawl underneath, mark the gunnel lines, pop the whole
: thing off and cut away the nasty dangling excess. Install wooden inwales,
: temporary cross bracing etc. etc., and proceed to fashion your own deck
: atop the existing structure ??? Fire away !!!