There are all the history lecture series on the Mises Institute. I’m sure there is a lot of good stuff on the Gilded Age in there.
Reconstruction: http://mises.org/media/1883
Myths About Big Business: http://mises.org/media/1887
Labor History: http://mises.org/media/1430 (part 1)
http://mises.org/media/1432 (part 2)