I just saw this free download from Waves: 4.8 GB of convolution reverb high-definition impulses for any of their IR-series plugins. Never noticed it before. IDK if this is the same or different from the libraries included in some of the other plugs in the IR-series. I only have the IR-L (just bought the gold bundle).
So, you might already have it. If not, enjoy!
https://www.waves.com/downloads/ir-convolution-reverb-library