From 6 to 8 mtr is a big difference in size

Depending on what your chasing your best option would be to try and track down a Leeder mould (although they only ever did a few Center Consoles.)
A good one would be a 23' mould that was used to build the Saltwaters. If you contact Michael at North port he might be able to steer you towards who has them.
A last option that i can think of would be Sprayline. The old thomas craft but they are bigger again.
Had you thought about buying something already finished and converting it to a Center console? It would save a lot of time and money

Either way Michael would be a good place to start, he seems to have a finger on everything like that..