The aa.com website is incapable of displaying IB award availability. If you have a BAEC account, you can check IB award availability from IB's U.S. gateways. You can then call AA to book the itinerary (including connecting AA flights if you can find MileSAAver availability on them), with modest IB surcharges. You could also ask AA about availability on TN's LAX-CDG nonstop, connecting to IB CDG-MAD.