Fractal has their unobtanium LB-2 load box back in stock. Just ordered one after building a load box from scratch and not being completely happy with it in the end.
Jon at Sonic Drive Studios on Youtube uses it almost exclusively in his later videos if you want to hear it with various IRs. He’s a strong player so its a good representation.
Not trying to stir up a virtual amp versus real amp debate, just a public service announcement is all (ps: Cantabile to host the IR loader and post FX). 