I've never had the pleasure of trying any of these but I found out a family member will be traveling across the pond and asked if I'd like anything from merry old England. Are Esoterica blends readily available or are they still a rare find even in their home country?
The Esoterica blends were created for the US market and are only for sale here. They're mostly semi aromatics and some of them are pretty good and unique. There are no equivalencies. In the UK you do have Germain's Rich Dark Flake, which is a kissing cousin to Esoterica Stonehaven, and I find it more interesting.
A lot of McClelland blends weren't better than everyone else, but their Grand Orientals were excellent, and their matured Red Virginias were superb. There are no equivalencies there, either. I also like their 2015 and 2010 bulk Virginias.
Gawith and Hoggarth are still turning out a first class product and I'm very fond of their Glengary Flake, among others.
You also might look into HU blends, available from Esterval's in Germany. MacBaren also turns out some excellent blends, as does Sutliff in the US. These companies have huge stocks of well aged leaf to work with.
The problem is that the tobacco business is undergoing a significant change as more and more sources dry up, growers turn to other crops, and blenders substitute components in their releases.
For the most part I'm not a big fan of what's currently being produced in the US, the exception being some of the Sutliff product, since they can work with stocks that date from before things started to go to hell. There just isn't the depth and complexity I've come to like. So I've stopped buying and will content myself with what I have.