Hi Tapas.
I'm surprised myself that Yamaha have not released any CD's with WAV samples by now, considering the T2 has been out a year this November. There would be a definite market for it but it looks like Irishacts may come up with some sort of offering for us all
It's not that hard creating your own samples, although it could be time consuming if you are going to use multi samples for each note.
There is a 3rd party doing a Steinway sample who I know fairly well, but I'm not sure if he will make this 300+mb sound available for sale to the public as I think he is mainly doing it for himself at the moment as a project.
As for anyone not liking the internal T2 piano, instead of moaning or stating they are not happy with it, it's far easier to get off your backside, use the editing software and make your own piano up.