Last thing remaining in the my garage from breaking my G40 earlier this year:
They are vented and as the image shows they are also drilled. They were used for one track day last year so about 60miles in total.
I have had them skimmed professionally on a lathe to ensure that they are nice and flat.
(http://i19.photobucket.com/albums/b155/robinyau/Polo%20breaking/P1040989_zpska7ybvow.jpg) (http://s19.photobucket.com/user/robinyau/media/Polo%20breaking/P1040989_zpska7ybvow.jpg.html)
£20ono for the pair, I can have them posted for an extra £10.
Now sold.