The correct answer, so far as I know, is that this is unknowable. McClelland was intensely popular so that few thought it would go out of business entirely and not sell the brand to someone else (who may or may not have tried to replicate their original glory).
But to play along, I guess an idea would be to identify a brand name that is a premium name but not in vast production. G.L. Pease, Esoterica, and maybe some special editions might be prospects. Some blends might be clunkers and others might be winners, like buying stocks to hold and sell at some appointed future date.