Help! Trip coming up. Where to find sourdough spots in Naples?!

Hello!

I’ve been MIA for a bit but I’m back. Been focused on a new job the past year that I haven’t been able to post as I used to. Part of it is I’ve just been practicing as well when I can and haven’t had any additional questions as before. 
Making a trip to Naples next week. Other than the Pepe in Grani (outside of Naples) that my understanding may use a combo of sourdough and commercial yeast (or perhaps all sourdough)…are there spots in the city limit members can please recommend that are still doing the old school natural leavening?! Would love to visit those places to try!!

Thank you much in advance!!

Ash