I just purchased some 3v XHP50.2’s from cutter a few days ago. https://www.cutter.com.au/product/xhp50b-00-0000-0a00j4051/
KD also sells the 3v version. http://kaidomain.com/cree-xhp-series-leds
The cutter 3b came in 5000k, so I went with that insted of higher cool white.