So, OP, you’re particular. But, it’s not that difficult to buy the parts you need and assemble it yourself. My Jazz has a P neck - even more unusual than the other way ‘round, but that’s what fits my hands. So I put mine together.
Fender makes what they think people want. They don’t make everyone’s dream bass; some of us have to do a little work ourselves.
People have been putting jazz necks on P basses since 1961...so one would think (since there are pro players who do this as well) that in almost 60 years time somebody at Fender would go hey why don't we make this a standard option...
