You can't buy from bit-z right now. You should wait for 20th of January for listing.
You can buy sophiatx from etherdelta, qryptos and cobinhood currently.
Cobinhood looks quite good and it charges no commission fee for trades at the moment. They say their Tier 1 verification usually takes only a few minutes, while Qryptos takes like a week or two.
Well, I like cobinhood. But there are issues, my Tier 1 verification has been pending for a few days.
There are no fees, true, but there is very low volume.
You are right. I just found out they have a minor issue in their KYC API and a high amount of applications received, so they need more time to check every single information manually. Their FAQ is not updated with this information.