I ended up going straight to the National Archives POW search page. It came up with the same transcription I got through here, however next to Camp 091, it said Stalag Luft IV, which is the camp that made the Black March which matched the story my grandfather told (he is still alive and 100% with it mentally, just doing some research for documentation since he doesn't have any). I then researched that camp and found other websites devoted just to the history of that camp which had rosters of who was there and he was on all of them. But, I am still trying to find one other camp he was at, from what I understand from his story, he was at another concentration camp before this camp, but there is no document of that, at least as of yet. What have you been able to find?
This is one of the sites with a roster: http://www.b24.net/pow/rose/