Dansk responded yesterday that they will not reimburse anything nor will Parts-Wise. Here is their response in case you are interested.
I initially contacted Parts-Wise with my complaint, they in-turn contacted Dansk, this what they initially came back with:
"[the Parts-Wise] ...complaint on this part is the first and they normally advise to do both sides in once."
You are reading that correctly, Dansk advise that you should replace both wings at once. Obviously I was a bit annoyed at receiving this crucial instruction retrospectively, I sent the above photos and asked them to try harder.
They came back with these shots of OE Porsche parts:
...and this response:
Basically in their view all parts are unequal and will not be a 100% match to that on the car - either Porsche or otherwise.
I do sympathise with their response, we've welded it and committed to using it when we probably shouldn't have. In my view the part they supplied isn't just a little off, it's way off. More so than the shots they sent through. I am now have to get the side repaired again at my expense.
So as a public service message just beware when using these parts, you could get duds and if you do push back before you use them!!