Yes, Dunhill has blended a ton of aromatics, but unless I'm forgetting something, they were all only available in the Dunhill stores. Years ago I picked up an 8oz tin of A2100 at the 5th Avenue store in Manhattan. It was a very fine shag-cut vanilla blend that, to me, was much more flavorful than MacBaren's Vanilla Cream. But it had to be smoked extremely carefully, due to the very fine cut and the flavoring. Some say blends bite if you push them; this one was liable to bite from just sitting down next to it.
BTW, the "tin" was an oversize silver canister with nothing but a sticker on the bottom to indicate the contents and a twist-tied baggie inside. It's possible that some Dunhill "house" blends actually got the full tinning treatment, but this one didn't. And the 5th Avenue store didn't carry any that did. (You might have had to go to London for that.)
But it's all moot now anyway. Dunhill stores -- at least in the U.S. -- have been 100% tobacco-free for nearly a decade.
Bob