Richwouldnt, you might be able to at least stick your foot in the water. It’s not terribly difficult to put a red LED into an existing host, as long as you make sure to keep the current at appropriate levels. The XP-E2 won’t deal with the same amount of power we give to XM-L2s.
The brightest one I’ve made goes up to about 170 lumens of pure red (driven very conservatively), with 1x16340 as the power source:
This is a rather small light, nowhere near the output you seem to have in mind, but on the highest mode it kind of makes my eyes want to bug out. It’s just soooo red!
I’m only doing 700mA on mine in order to make it more efficient, but you can probably safely get 300lm per emitter at ~2A each. And since it’s so small, it should have pretty good throw. You might want to use LiFePO4 3V batteries instead of the common Li-Ion cells we use though, to keep the voltage down closer to what the red XP-E2 wants and reduce unnecessary heat.
Or of course there’s the CR6. Much easier than building one.