Hi Alonso I bought the bumper of a member on this forum about 5 years ago from London I believe it was bought from German eBay its an rs4 style bumper for an a3 sorry I can't be much more help, you can buy the side vents for around £50 and have them moulded in and the bottom mesh in the bumper grill is just plastic honey comb mesh, the lower splitter is of a cupra r with an s3 grill it looks good, I love that car she turned heads everywhere.
Cheers Chris
Cheers Chris