they might not even base a flea signature jazz on his white one, he might want something closely related to the musicman/modulus, like maybe a jazz with the seymour duncan musicman pickup he's using in his modulus atm and active electronics?
i doubt a white one would sell all that well, they've just brought out that squier which is pretty much the same (60's vibe is it?), the american standard, the american vintage 62 (which is exactly the same as what flea's playing, except flea has no pickup covers), the classic 60s jazz, that all come in those colours, and thats the only thing that makes flea's bass stand out from a normal jazz, apart from the stacked knobs which the american vintage 62 has got.
personally i think they'd do a lot better to make like a funky sparkly blue jazz with 3 band EQ and J/MM pickup configuration and BADASS II bridge (like on the modulus), something thats completely different to any jazz they've got out at the moment.