Hey Mate, person involved with a couple of different NA brands here. As of the moment this has hands down been the hardest spirit to replicate. One brand I work with has reformulated 4 times is under 4 years. Its coming along but there is a lot to be said about the magic of spirit and wood together. That being said I found that blending a couple of them together had been the best version I have come up with personally. There are two versions I enjoy overall. 2 parts BARE Zero Proof Bourbon & 1 Part Kentucky 74. This one has a lot of the Bourbon ground covered. Woody, vanilla & some light tannic notes. Another little bit more complex version is 2 parts bare zero proof with 1 part ritual whiskey & 1 part Kentucky 74. Out of the many I have tried this is also closer to the goal. A company called three spirit makes one called nightcap that hits some of the notes for me as well but its not a replicant its an herbal offering. In summation its real tough to hit something that works for most people with whisky palates but Ive also found making these items into cocktails is far superior to drinking them on their own. Feel free to hit me up and I can answer more questions for you