Dont know if your still lookin, i have a silver left lower belly pan piece for an 03 Mille which has 3 or 4 scratches but is still really useable. Prob. just needs rubbing down. I also have an undertray which is missing the number plate bracket on one side, obviously wouldnt be needed on track! If it was me i'd take a hot knife or similar to the otherside and make it streamlined, but apart from that it's perfect and dead easy to fit! Other than that i'll have a little looksie to see if i've anything else...
PM with where your based as it'd be cheaper to collect given the size. But i'd let them go pretty cheap.