I have one at the wheel shop and I was quoted $CA207 ($US155) taxes in.

whereabouts are you located in Canada? I'm looking for one too maybe getting it fixed prior to lease end

Lotsa gouges there, more than a cosmetic fix. You have an expensive auto, deserves the best you can do for it and it reflects on you as well. Let the pros handle it. .02

Perfect time if you want to change the color of the wheels. Sand it a bit and get it powder coated or plasti dip it yourself. Just don't hit any more curbs. :-)

You need to CNC fix this rim.

something like this:
Had one of my S5's wheels restored as well. They will cut a small piece of your rim, apply new clearcoat and it's good as new.

Don't go with sandpaper, because it will change the structure you see in the metal. (that's because the rims are cut with a CNC machine from the factory)

If you look closely at your rim you see fine circles across the 'bare' metal part of your rim. That's from the diamond cutter in the factory.

Normal rims you can just sandpaper the curb rash, fill it up, and respray

My dealership (Audi Beverly Hills) does it for $150. I'd start by asking your dealer.

Search around we have a few people around that will come to your house and do it for $100.00 per wheel.

Réparation De Roues (Montréal, Laval, Dorval...) - Exact Roues

A bit minimalist as a shop but they are considered the best in our region (Montreal)

SABS in SW Houston.

There is a company called Alloy Wheel Repair who can fix Rim Curb Rash and they work with a lot of dealers: https://www.awrswheelrepair.com