Anyone know the manufacturer of this LED?

I've been working on a backlight retrofit project with some odd and fairly tight spectral output requirements. Specifically, I need a cool-white LED with a very low CIE Y value. Something around x=.3 y=.28 resulting in a purplish/pinkish tinge.

As luck would have it, one of the first engineering samples I ordered from <insert random Chinese Supplier here> as part of a larger kit nailed the requirement perfectly. What luck! I ordered an additional large lot of exactly the same part--- and was sent completely different LEDs the second time around. The combination of language barrier and reluctance to name their own suppliers has meant I've made no progress on tracking more of these suckers down. I have 50. I need about 2000.

( Large photomicrographs under the cut )