Hi Vikki,
Here is a link to the site you will need to obtain a headstone:
http://www.cem.va.gov/hm_hm.asp
If you already have this info, sorry for the repeat. Just out of curiosity I tried the information my friend gave me and I didn't find anything on the Sons of Union Vets web site that would have pointed to the va site. (I might have missed something obvious.) I didn't want to give you bad info, that would have slowed down the process for you. Good luck with your quest for the headstone.
bg