Not exactly, but I'm sending my greenie KL1 to Chop to put in a LuxIII and overdrive it, which I'll pop onto an ecan for some kicking bright white light! That's a probably a lot easier than modding the E2 bezel. Or you could just buy a KL4 and get 5watts!!
I remember Chop guessed an overdriven KL1 with LuxIII would run about 45 minutes on one 123, and figuring it runs a little brighter and draws more from 2x123, it'll be less than double that, maybe an hour and then some? Depends on the forward voltage of the LuxIII, too.
Welcome to CPF Delled, and stay awhile!
daloosh