When I bought my two M BRACE RCA units, I also switched to the Microsoft Natural Keyboard Elite. In combination, the pain went away, and the keyboard prevented me from continuing to injure myself.
Since Microsoft introduced the "split" keyboard, many more have come onto the market. They cost about $39.99 with free shipping and once you've begun using one, it's unlikely you will return to the old style keyboards. Enter: Perixx PERIBOARD-512B (for black) or 512W (for white) in the drop-down box below to see the 2013 version of what used to be known as the Microsoft Natural Keyboard Elite, which sadly appears to have been discontinued.