This expansive website has a lot of useful data about LED CRI, Color and variety.

Plenty of colorful large graphs. Easy to see!

Waveform Lighting

It is a retail source. They are not the factory, I assume, as they are in SF CA.

The good news is they have an affordable sample of their best.

ABSOLUTE SERIES™ LED Linear Module - 99 CRI - 1 ft / 280 mm MCPCB

Of course I have no connection with this company and found it web surfing.