You might not be into tobacco flavors, but I had a "pre-made" juice that was a turkish with some kind of spice... I finally figured out is was cardamom (that I love in real life) Any tips on a cardamom flavor? I might also try it in bakery recipes.
It was a long time ago that I tried to make my own chai blend eliquid. I understood you shouldn't vape essential oils. I think it was an alcohol based cardamom extract, but it didn't work. As I mentioned, the flavor just wouldn't stay in the bottle, much less make it past the coil. I tried making a cake icing with what was left, with powdered sugar, and that tasted pretty good.
Gothic Vapor has a Chai Tea flavor, but I didn't buy it a second time. The description says "masala chai tea with a twist of vanilla cream". When I looked just now, to make sure they still have it, I noticed they have a second one called "Masala Chai", separate from their "Chai Tea". Just a warning, it's a flakey company, but a wonderful company with great service. They've been around a long time, but I think they were once visited by FDA or were punked by an underage buyer, something. Now you fill out your order, submit it, and then you have to call in your payment. They'll have the order details, so you won't have to spend a lot of time going over that again; just your payment details. They don't ship to California, because they believe flavors are banned there (I don't think so though, not yet anyway).
Also, and I don't want to mention the company name here because their ad is on my website, I once made a mixture of their blackberry and choco-chai, because the choco-chai was bland. Mixed with the blackberry, the result was blackberries with cream and brown sugar, a very nice surprise.
Currently I can suggest that you vape your best rich tobacco flavor while sipping a cup of Celestial Seasonings Bengal Spice tea, especially in cold weather. It has such a beautiful, full flavor. I buy the whole shelf when I see it, because it sells out when it hits the store. Cardamom is one of the ingredients. It's sweet without sugar added.