Why not see the CPF Dealers section right here on CPF?
Or any SureFire Dealer will be able to order an "L4" for you.
Or, if you call SureFire 800 828 8809, they may have some stock of the L4 too.
The L4 is the complete flashlight - it's an E2e body (etched with "L4" instead of "E2e") with a KL4 bezel on one end and a Z57 Clickie TailCap on the other. SureFire have made the price of the L4 very attractive compared to the prices of the KL4 and Z57 as accessories (I don't think they are available as accessories at the moment.)
Al