Many years ago I saved some information from the Mastertouch web site
about the various pianists that had recorded for that company (myself
included!).  I'm glad I saved it as I just realised that with the
demise of Mastertouch, that information would otherwise have been lost.
I've put it into a PDF file which I hope might be found useful.  It is
available here:

http://www.glennamer.com/amer/Piano_Rolls_files/Mastertouch%20Artists.pdf 

Glenn Amer
Sydney, Australia
http://www.glennamer.com/ 
http://www.glennamer.com/amer/Piano_Rolls.html