Did check kaidomain. In general it seems that LED shops stock only centering spacers while I would need something suitable for bare XML that is 3,5-5,0mm high (higher than XM-L).
Alternative is cutting a pice of white tube.
I don’t know for what type of lights are they intended but I’d use them for bare led to keep it from touching the front glass and to keep MCPCB and wires hidden.