Please educate me on Nichia 219 LED's.

this light

has a plastic spacer stuck to the reflector
and I’d like to put a Nichia (on a star, from Illumination Supply) in place of the cool white emitter.
Any suggestion welcome if anyone recognizes this — whether I’ll need to change the spacer (to what?) or replace the reflector (with what?) or just learn to love a donut …