Off the top of my head:
1) Arc LS w 2AA TSP
2) Everled?
3) MiniMag w Opalec or Sandwich dropin
4) Tektite (not sure of the model numbers but they have some which fit your category I'm sure)
5) UKE 4AA eLed
6) McLux PR head (insert ur LS of choice here) w 3x123 UBH (you can run 2x AA with this)
I think Stanley means the UK eLed. A great choice for a handy general-purpose light with adequate brightness and a long fully-regulated runtime. This one is a winner, as far as I'm concerned.
I use the Surefire KL1 head with a Vital Gear 2AA/3x123 can. And one day, hopefully soon, there will be a 2AA for the Arc4+. Also, while the Eternalight EliteMax is not Luxeon, it is AA, regulated and floats!
Waynej of www.elektrolumens.com *may* be coming out with a regulated 1W 2AA light this year; he hasn't decided whether to sell a 2AA regulated, 3AA Direct Drive or both.
Also, Dorcy 2AA Lux (regulated?) is coming out soon.
It's hard to find a 2AA regulated light for a LuxIII... simply because the use of a LuxIII as opposed to a LuxI means that the driving current will be higher. If the LED current is high, the boosted AA current draw will be even higher... leading to 1/2 hour runtimes and reduced practicality.