forms pre WWI

Please,  if I could have  the correct form  for an Honorable Discharge RECORD of a Civil War Veteran that is buried in Riverside Cemetery, Colorado that does not have a headstone. 

I have a lot of proof of his service even a pension card  that has  T532682  and  application 127925   Invalid Date Nov. 24  1873  James Abernathy  of the 117th Illinois Infantry.  Colorado Pensions.

I would like to apply for a military headstone  for him.  I have spoken to the cemetery and have their permission and

they will provide proof of him there and photos that show there is no headstone.

Thank you,

Carole Taylor, Individual