'practice pedal' for grands

[Larry]

I remember hearing that a felt strip mechanism was available for grand 
pianos, much like the practice pedal for uprights.  I have never seen one 
though.  Does any one know of this and its availability?  I have a customer 
with a Yamaha C3 in an apartment!  (She moved from a house).

Thanks,

Larry Beach, RPT
Vancouver, BC