By the way, I guess this 4.8GB Waves library of Impulse Responses could be used inside Convolver:
https://www.waves.com/downloads/ir-convolution-reverb-library
Okay, I used my $30 Phase Plant voucher to get both, i.e. two Convolver plugins, into my account by upgrading both Toolboxes. Sadly only got one. Still, nice gift from Kilohearts.