Information can be found, that former POWs settled in Canada, or instance, in the Legion Magazine, but it lacks information how these former soldiers were seen. Was a probable contribution to the holocaust considered or ignored? Were they already "covered" by Clean Wehrmacht legend?
Not really what you're asking about, but something I wrote in the past on a related topic- not about POWs but about rocket scientists. I hope it has something like what you're interested in, if not exactly!