Maybe you can make custom actions with "Select all
Events" ("Events" includes the CCs) and "Set selected to channel X" (One for each channel). Then you can add these to half-size toolbar buttons with numbers 1 to 16 and can change the channel with one click.
hopi made some very good halfsized ones and even included a Photoshop file, thread is here:
Toolbar Spacers and Titles - a different method.
They look like this:
Screenshot
Just wanted to mention this, maybe it's of some use for you...
Peter