How are you going to be using the cameras? Are you shooting, say, the same event with all the cameras (shooting from different angles), or are you shooting several different events in different locations, each with a different camera?
Where in the world are you? It's certainly possible to get those two cameras into the same visual ballpark with a good waveform monitor and all but your post workflow is going to be quite difficult mixing those two formats. If you're anywhere near a major city- and you must be if there's P2 around- you should be able to find EX1s or get them shipped to you.