So, when I buy incense, I usually buy resins, herbs, woods, etc - and blend my own if I need a blend. I almost never buy stick or cone incense (the exception with blended incense being Kyphii, which takes MONTHS to make and a lot of space, and so is just cheaper to buy).
I've already mentioned one company I use. The other company I use is Ink 'n' Scents, which is an etsy shop.
They, like Ethereal Aromas, came to our local Pagan Picnic yearly gathering, and just like EA, they travel the world finding the raw materials and the genuine products. They are also super knowledgeable about what various incense ingredients are useful for - elemental and planetary associations, alchemical uses, magickal and metaphysical properties, etc. REALLY great store.
Both stores have very similar packaging, both sell different breeds/varieties of resins etc., and both have excellent reputations because of the quality of their items.
Here's the link to Ink'n'Scents (the link to Ethereal Aromas is in my previous post).
https://www.etsy.com/shop/inknscents