The Insert Piz Here midi collection has a couple of plugins that can convert CC to PC one is called midiConverter3 and the other is midiProgramChange.
They just have a generic interface, but for the midProgramChange there is an alternate version with a GUI here
http://thepiz.org/plugins/?p=midiPCGUI
I do recommend getting the Piz MIDI plugin collection though because it has a lot of useful plugs.., it can be found here
http://thepiz.org/plugins/?p=pizmidi