I suppose I get your point about the switch but do you honestly feel it's flimsy or do you just hate switches?
I like my L1D a lot!
P1 does what you want but it makes you use 123 battery.
I'm not aware of another twist head AA besides my CMG Infinity.
You MIGHT want to check out (shoot - dang brain) well someone will help out here. They make aluminum. brass and SS lights with twist heads.
Has the switch broken on you?
The closest 1 AA that works like the L0D-CE is the Jetbeam C-LE.
And Not forget the Fenix's own Civictor :twothumbs
Not trying to be smart, but how about using the L1D tailcap as a twisty? Leave the switch on, then tighten and loosen the tailcap like LOD. It's the best of both worlds...