What I've meant by 'same company' is that Bosendorfer is owned by Yamaha, maybe a tad misleading from my side. It is not VSL.
Actually it's one of those you've ruled out 🙂
Yamaha, not VSL, nor Pianoverse, has dedicated Una-Corda samples (I've mentioned I used the pedal). Now it's super easy, so giving the answer should be a formality.