I feel your pain, I reversed into a concrete post in a car park in my S5 sportback. Needed the whole bumper off and resprayed 
I hope so. It's in on Wednesday. I can get a replacement boot then that fits but that creates be a load of other work in paint matching, glass bonding etc and I'm not down down for that.A good PDR will get that out seen them do a lot worse dings.
Perfect.. that's awesome. Thanks mate.As it so happens, I have access to partslink at the moment to get some part numbers myself.
Plugged in RS5 Sportback 2020 and got this for you.
P/N: 8W8 827 025 E
OEM Price: £701.12
If you’re going for a new lid from Audi you can give them your VIN and they will be able to confirm that is definitely the correct part.
Even if you’re going to look elsewhere not a bad idea to confirm with them anyway.