David, I found the list at the National Archives 30 years ago or so. It was a photocopy of the original, which was apparently never microfilmed (although it may be now). I presume that photocopies were made of the originals for the rest of the Army of Tennessee, but I didn't inquire about anything other than Arkansas regiments, so I don't know for sure.

Being brand new to Civil War research back then, I assumed that everything held by NARA was on microfilm. I was surprised to learn that -- at least then -- most of their Civil War collection was NOT on microfilm.

BTW, are you aware that the Appomattox Parole List was published in the Southern Historical Society Papers in 1887? It takes up the entire Volume XV of the SHSP.