A "Jazz bass" is really a pickup design and configuration. So apart from the trad look of a Jazz bass, it can be any bass with those pickup parameters.
I have a Jazz bass clone, which is a 6 string. I have other Jazz basses which look nothing like a Jazz or play like one, but sound like a Jazz.
These days most makers have P, PJ, J, MM, Humbucker options. So the first question is how much like a jazz clone are you looking for? The next question is how modern to you want it to interpret the theme? Are you looking for a bass which looks like a Jazz but are modern interpretations of it (Mike Lul, Shadowski, G&L come to mind). Are you looking for something very modern (Warwick, Status, MTD) come to mind. They won't look like a Jazz, but have Jazz pickups and sound like one (with their own added DNA). Then there's the whole bespoke / custom route...such as Scott basses (love his stuff) Sei etc. Really it's your choice, your budget and your bass wishes. None of these route is right or wrong. The market exists for all budgets at needs.