If you’re looking to find AA Business SAAver Awards, ExpertFlyer is a good way. But please read the Wikipost at the top of the page of
HELP DESK: MileSAAver / SAAver award questions, assistance for some useful SAAver information, which tools you can use to search for award seats, which airlines are reflected on aa.com’s award searches, etc.
BX points can be used as long as the U fare is availabkem iirc, and of course you can call.
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Good luck.