There are plenty of enginesounds on DLS, and I am certain that their kudis work being edited into the config file of 09/10 locos...for free
Also, have found a multitude of bell and hornsounds, that when edited into the TVG, and other carpy sounding default Auran loco's...they make a vast improvement over the default sounds. Some of the sounds are over at USLW and other 3rd party sites.