For a reflector light if you want an off the shelf solution the KDLIGHT C8-COLOR could work. Or even cheaper, this 502B .
If you need something more powerful perhaps you could build a triple using this host: Sofirn C8F host. 21700 C8F Available , you will need to reflow the leds on the MCPCB. However the driver is 17mm, and i’m not sure a FET would work for a XP-E2 triple, something from led4power could work.