I'm going to attempt an experiment, and will let you all know the results.
I bought a Zodiac DE a while back, but never really liked the tone of the Quarter Pounders in it (they've since gone into another bass, and sound great, strangely enough), so I swapped them for a set of EMG GZR pickups recently. Holy cow! It's a whole new bass. But, then, the skinny J-width neck started bothering me. I've never got along with them, even though my first "real" bass was a MIM Jazz, like 20 years ago. Anyway, I just bought an old loaded T20 neck that should, theoretically, fit (heel width works, scale length and number of frets match). I'm sure it won't be a perfect bolt-up-out-of-the-box situation, but I'm optimistic it'll work, and will make the Zodiac a killer PJ for little coin.