You can order them through this site. There is an advertisement that flashes in the middle at the top of the page. If you are in SC, most larger libraries have the microfilm records for SC Civil War men.

One of my ancestor's was in the 14th SCVI and his record was much more complete than an ancestor who was in the 19th SCVI. I would highly recommend you get his service record. Even it proves to be scant, it is fascinating reading.