Yep already had a look...
Very shallow discs at around 45mm deep so almost impossible to get any brakes behind them without something like a 20mm spacer over a 7.5J rim such as a Pescara or Monza. The TT-RS comes with 19's which I think are 9J.
So a really good option for a MkII TT owner.
Good news is the discs look good and I can pick them up for around £350 the pair and being 370mm means that they are a really good candidate to chuck some GT3RS calipers over, I'm ashamed to say Ive got a couple of sets under the stairs.
Also got some Carrera GT (V10) rears which are the same as the RS4 ceramic caliper family. These are good for 380mm, so for somebody with fat 19's they'd be good to use.
I'm more horned up about plans to use them with a S3/R32 Caliper with some clever bracketry - Wife has banned all things brakes right now until she gets to see the top of the dining room table again - says she's forgotten what it looks like...