I'm selling some here in the USA, but I don't think it will help you. They are not OEM either.
Just for reference, these are 20" x 10" rims, bought and used them for years on my 2004 A8L, but they fit fine, but are pretty close to the suspension knuckles on the front.
The tires are 275/30 20's.
Pilot Sport A/S Plus, and have been great, and should be good for another season of summer use.
Replaced them with a set of Continental DW's, in 255/30 20's on 20x8.5 BremmerKraft wheels in a PVD finish. (Dark chrome, mesh style.)
I do like how these 10" wide rims totally fill up the wheel wells, and stick out slightly. I never had the tire or rim hit the fender or quarter panels, but I suppose if the suspension was compressed fully, it might happen.