Sorry, I made a few mistakes here.
It's not magazine, but it's one of constant articles( I don't know if it makes sense, if you know what I'm trying to refer, can you tell what word I should use next time?) IN magazine called Shuukann kinyoubi/週間金曜日.

No, you can't buy it at any convenience store cause it's kind of on the side of Left wing, I guess and it's rather like for minorities, I think.

Type following words on Google and you'll see. 買ってはいけない　週間金曜日

I think you can buy a book which contains just those articles on amazon.co.jp.