Huh? Are you implying that you know there's some sort of deal with Fender for a signature bass, or are you just speculating?
Based on the last interview I read, she didn't even change strings on the Jaco bass she got from them, and she's never really talked much about gear so perhaps there are some specific things she'd like different from the Jaco, or perhaps she really isn't that concerned with mechanical details as long as it sound good to her.
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"Without space, music is just noise piling up on itself." TRK
"Don't play your instrument, play music." Feral Feline
Lakland Owners' Club #248