Hi Mate,
Mine is the same or very similar to the Scoobyworld one, got it from a local shop up here about two years ago (I didn't wanna entrust it to a courier
) for about £300.
Quality of carbon weave and fit etc is spot on, the two halves of the spoiler don't meet up perfectly around all the edges but not too bad. Looks OK on and I love the look
Things to watch out for are the fixings that join the two halves together, had put much bigger washers in to stop them pulling through the spoiler (the origional ones were tiny) and bonded the join with tiger seal. Also had to drill the boot lid cos only two of the 4 side bolt holes matched up and I put two extra bolts in the middle.
Hope this helps