Help demystifying 85 Litre fuel tanks.

[Quickstep192]

I’m still hunting for an 85 Litre SC tank like the one in Picture 1.

The Dansk catalog shows a tank which has Dansk number 1615600200 and Porsche numbers 93020101002, 93020101004 and 93020101005.

Using the Dansk number on PP finds one tank and a different tank when using the Porsche number. See picture 2

Also, do I correctly understand that this tank requires a strainer? What am I looking at in picture # 3? Is there a threaded fitting there?