Not sure why WOW feels the need to keep Zero happy, they cannot be that big of a seller of them with the infrequent inventory on the site.
Marietta area wise I suspect the only good dealer would be Wooly's but their showroom is already filler between BMW and KTM. The Indian dealer down the street carries quite a few three wheel brand vehicles offset the poor availability of Indian models. The issue there is showroom size and Polaris having some deal with Zero. The only other option is for Mountain Motorsports to pick them up.
Going East BlueMoon already has Zero which I always found fun as their other main brand was Ural.
I would likely own an Energica EsseEsse by now if there was a dealer near