Although I personally don't have anything that uses that sized battery. I would guess that there's enough interest in the AW 14500 IMRs to justify stocking them too. And probably a growing interest, assuming more widespread use of LR attys, demand should grow. And there really are lot's of devices (think simple box mods) that take that size batt.
Switched, I still don't get why the top batt drains faster, but thanx for trying to explain.