Despirate to find records of Polish POW held in Stalag XI-A from 1939-1945

Any help to get records of Polish POW who was held in Stalag XI A from 1939-1945.
He was from Lodz.
Name Abram Ajzenszmidt
Birth year: 1915
He never spoke of how life was for Polish Soldiers in this POW camp. We only have a small amount of artifacts from his POW time. We found these after he died in 2006. Any help of what to do is very VERY grateful. Thank you.

Here's some information about Stalag XI-A: en.wikipedia.org/wiki/Stalag_XI-A

Couldn't find any prisoner lists online though.

Merged:

WWII Exchange of Polish POW's 1939-1940

Family history says my dad was in a prisoner (POW) exchange, Captured by the Russians in late 1939 and in Lagiers then transferred/exchanged to the German and then in Stalags starting with XXA in Thorne. This POW exchange happened in or near Hannover, Germany in 1939 or 1940. I am not seeing the exchange by simple internet search. Anyone have more information, it must have been significant?

Thanks

Merged:

Polish POW transfer from Russians to Germans 1939

old family records state my dad was captured by Russians in 1939, held for a while in Lagiers then there was a prisoner exchange in Hannover, Germany in 1939 or 1940 and dad went to Stalag XXA , the first of many Stalags . I can find no information online about this prisoner exchange. It must have been a big deal involving many POWs. Does anyone have information on this exchange?

Thanks Roman