Your uncle’s war experience sounds so similar to that of Ray’s. Ray was one of 2 survivors from a crew of 9 (maybe 10). Perhaps they were at the same camp. Here are a couple of links to a website that lists data about Stalag 17, including known POW names at that camp.
http://stalag17b.com/Docs/Stalag17bcom_US_POW_list_2015_02_21_Watermarked.pdf
http://stalag17b.com/files.html
Nope. My recollection is that my uncle was at Stalag Luft I (though I might have the number wrong). As I recall there were four Stalag Lufts. These were prison camps run by the German Air Force who had been given the custody of enemy fliers. The hope was evidently that if the Germans treated our fliers well then the Allies would treat German fliers well.
This might make a lot of sense because early in the war German POWs would mostly be fliers. Perhaps your cousin was not in the Luft camps because he misbehaved some way.
I read some of the information on your cousin and I think it said that of the other 9 crew members 8 were killed. That would make a crew of ten which was the normal crew for a B-17.
My uncle was part of the 303rd Bomb Group of the Eighth Air Force. Your cousin was evidently in the 379th Bomb Group. Much of what I know about my uncle's war experiences is from the 303rd Bomb Group web site. I did find one for your cousin's group: http://www.379thbga.org/
I was able to learn about my uncle's crew, the name of his plane, the nose art and other markings, and the missions flown, including the one during which my uncle was shot down.