Pre-Assembled Mc2E for Surefire M2 and L4

[MarkIAlbert]

I'm looking for a pre-assembled z58 Mc2E for my M2 (I want to keep the cap that came with the M2 as-is).

Does anyone know where to find one complete?

I'd also be interested in a pre-assembled z61 Mc2E for my L4...

Thanks.