I think if you could get APR interested you'd get a really good map but I think they're giving up with anything past stage 2 with the TSI, seems that way as they never really finished Simons, well I never heard of the car running 100% at full potential.
Might be worth having a chat with Rick at unicorn motor developments. Does amazing things with the 2.0TFSI engine that's where I'm taking mine, he's started doing the TSI's now and really knows his stuff