This this and exactly this. While the touch of the artist has passed into retirement, the processes can be documented. Not saying McClelland blends can be reproduced exactly, but it's kind of like the million monkeys pounding on typewriters for millions and millions of years. Eventually, some monkey is going to write Taming of the Shrew... almost.... excepting a couple misspellings because it's a monkey.
And who cares whether it's called McClelland, McClellan, or McLemore? Call it Brand X, source and ferment some quality leaf, and never reference where the tech came from. Simple.