Its possible to find the parts on ebay, what that picture above doesn't show is the special front splitter and also the special front pannel that comes on a mk2
It is possible to find these, as i have, but takes a bit of patients and time.
I did have a 3rd set of the intercooler piping, which I pass on, but looking at it and thinking or the boost levels you might be running it would be a better bet to get some metal pipework made up, which is what i think i will be doing later in the year once my 2nd one is built, i just don't think the plastic piping will really be up to the job