Triple XPG2 Convoy S3? I think the others with the deep reflectors have too much space to fill in, though I guess the pill could be extended with a chunk of copper bar stock...
Well, there is a 12x Nichia 219 Nitecore TM15: http://forum.fonarevka.ru/showthread.php?t=15653
But I get what you mean. ;)
Good news. Those are really good looking and come in handy if you want to drive XPG/XPG2 really hard. For Nichia 219.. I wouldnt bother, we've seen tests and the Nichia doesnt win that much when its on copper. Also, looking at Matchs graphs, the XPG2 doesnt win much below 1.2A either.
You need a lot more than 4A for the Noctigons to really kick in. Im thinking of 6A and above. So either a lot of stacking, direct drive or multi cell lights.
I hope IO will also offer the suitable Carclo lenses.
Right, stop moaning, learn to reflow, learn to stack. get your own job done and be very happy about it (just described my own developement from the last few months :-) )
And your heatsinking will have to be even a bit better than usual to stop the plastic TIR optic from melting (what is the melting point/deformation temperature anyway for these optics?)