Need help identifying concerts (Live in Japan 2xLP)

I don't know what are the rules here about asking to clarify regarding bootleg recordings. But I have a few questions about them, because I see some are on sale for a very high price, even though most concerts are already found/shared online.

First question, which source/date is this LP from ? It doesn't mention anything about quality/source or even year.

www.discogs.com/release/6498397-Europe-Live-In-Japan

Secondly, I'm looking for the Prisoners in Rome recording. The soundboard version of it, NOT the audience which is already online. Any hint where to look ?

www.giginjapan.com/scan182/europe-prisoners.htm

I am also interested in this John Norum concert. It's already on youtube, but I would like to get the source. I am very good at removing noise/improving audios. In fact, I already have a channel where I did that for electronic music. But soon I will make a new one and focus on hard rock.

www.giginjapan.com/john-norum-88total-control-tour/

I have tried contacting a person who seems to have EVERY possible Europe/Norum concert, but he doesn't reply sites.google.com/site/europelist/Home