I made an E series (Aleph compatible) 2xAA light with a clickie tail cap and Aleph 2 style head as a proof of concept for a client about a year ago. It never came to anything but it was a cool light, IMHO. :shrug:
And there was a mag mod that allowed for Aleph and E compatible head hosting on the mag AA:
Goatee ... those are the UBH bodies I mentioned in my posts. They came in NAT and brass IIRC. As a substitute you can use the Balrog bodies of the same size or said Vitalgear 3x123 body with clicky or ... other custom options like TB's tubes.
There is a thread linked in the McGizmo FAQ thread listing and showing all E-Series options including those bodies.
You *can* use the 1,5xCR123 Aleph body with 1xAA, but tolerances might get a bit tricky.
Balrog bodies (came in various sizes, bare, NAT and BK)
i cant remember who made it or who has it, but there was gold plated or gold coloured AA light that sorta looked like a Mcgizmo creation. i'm not at home right now but i think i have the pic at home and can try posting it later. i think that was only a 1 time thing.