There is a thread for plugin request. I've already made a request for an IR reader. We can even imagine a cabinet simulation in the kind of the Sound Machine Wood Works:
One could choose the cabinet, the speakers, the placement and configure it.
A great cab simulator is the C.A.B. from Two Notes. This is also a good starting point to imagine an UAD IR plugin: IR reader + power amp + EQ
Anyway, you can use the new Fuchs simulation: you can bypass the preamp, the power amp and the cab separately. It's a quite good workaround as the cabinet part is really good.