Do R30 cellulose batts exist?

I’m looking at the Nu-Wool site. Their Ecocell cellulose batts max out at 5.5″ thick and R20.I’d like to get to R30. Are R30 batts readily available? Or is it… I’m looking at the Nu-Wool site. Their Ecocell cellulose batts max out at 5.5″ thick and R20.I’d like to get to R30. Are R30 batts readily available? Or is it…Read MoreGreenBuildingAdvisor