Civil War?? I was thinking the WW1 and WW2 reenactors who I don't really know much about.
For the earlier stuff, yea I think everyone has gone to reproductions for use in the field.
Apparently, for a while in the late 1960s and early 70s some CW era stuff was still available fairly cheap.
With Rev War, every now and then at an event we'ld host, someone would have a few original items - generally small things - to display or show visitors.