I found it on aa.com. There is a seven day advance purchase, but no minimum stay or day of week restriction. I just checked and there are approx 10 departure dates available from Jan 27-Feb 18 for 1 night stays. There are also a few days in March available. Did not check beyond this time period.

Use the flexible dates and date range feature. Cannot easily find same day in and out with the flexible date finder feature, though. As far as I know you need to go in and check each date for same day in and out. There are some available though. Did find 1/24 in and out available, for example.