Black bonnet

ouch!

Have you tried ebay - " audi a5 breaking " - i got mine for roughly £150 delivered in ok shape but luckily i was getting it repsrayed so the odd scratches on it didnt bother me

how bad is your one? Does it look terrible? if its not to bad its worth waiting for one to come along in the right colour.
If you have the ebay app ( you may be able to do this on the computer aswel) but you can save a search and it lets you know when something matches that search comes up.
When i needed bits i put a saved search in for " Audi A5 breaking" within 250 miles. So every a5 that was listing being broken i was notified of. Worth doing for your bonnet good luck