I have the same preference. I was unable to find any stock headlamp, so I purchased a Spark SG6 and swapped in a warm Nichia 319a. The bezel screws right off without any tools.
The headlamp works very well, but the flood beam is not as uniform as a Zebralight. There is a slightly noticeable image of the die in the center of the beam. This was evident both before and after the emitter swap. But I have not found it to be at all distracting in real world usage.