I couldn't quite remember what car this was off but thanks to a sharp-eyed eBayer I now believe it's an MGF Trophy style front spoiler. He did pretty well because I've photographed it upside down :) I'll put some fresh pictures on as soon as I can.
It looks to be the same as this one: [link removed by eBay] This is well made in lightweight glass fibre with a tidy gel coat (no cracks or damage and a very professional job) finished in black (some scratches but you would want to paint it anyway). There are some small screw holes in the bottom surface.
This spoiler measures 5 inches (130mm) deep and 56 1/2 inches (1.44m) across the widest point (which is at the back).
I can't 100% guarantee what this is off, but at 90% off the price of a new one it's worth a go!
Best collected from Stroud, Gloucestershire near M5 J13/M4 J18 but happy to discuss a meet up, just ask.