try dave in ozy park,,,, think his shop is in carbon court.
Bluejuice a.k.a rider5 on the windsurf forum, might be able to help too. has been toying with the idea of building one, still trying to convince him to

my tip for when building, would be lots of re-enforcement in the stand zone e.g.. small horizontal stringers, carbon, extra glass etc ...
Also a deckpad that is 'inbuilt' so it is flush with the board would be cool.
could do with some custom builders over here in WA.