To the OP, there is the option of the Who's Your Daddy and Lil Moma tanks from Big Daddy Vapor. These are primarily all-metal, heavy aluminum tanks with what I would imagine are polypropylene juice windows. The vendor says that they have tested to be safe for all juices. They come in several anodized colors, too. They look pretty darn sharp on a Provari.
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Wow. Coincidence. I have the exact same Black Lil' Mama tank and both the exact same drip tips. But my black Provari is a standard. And I also have a red Lil' Mama.