Time to get checked baggage and clear customs at CDG, if coming off an Air Canada flight at 9:30 am? Then, I will get RER to Gare D'Austerlitz. Thanks for the details on the time that route takes, with customs clearance, but it appears that your answer did no include waiting for checked bags! i will try to travel with only carry-on, but it is not always possible.
In summary it sounds like without checked bags one could get from plane to a train departure at Gare Dd'Austerlitz within 2 hours, if I added the times correctly. Thanks.