Here is the form required to obtain a VA marker. New rules require that only descendants are allowed to file for a marker. Furthermore, his grave should not presently have a marker.

I would not know if a spelling error would allow a deviation from the above rule. Local graveyard management might be able to assist you, or if a Sons of Confederate Veteran Camp is nearby of the Memphis Camp, they would be able to assist you.

Good luck,

George

https://www.va.gov/vaforms/va/pdf/VA40-1330.pdf