Pug1off are affiliated with RS-Tuning. I think that means you can put it on their RR and Paul will update the map remotely based on the data.
http://www.rstuning.co.uk/dealers-ezp-17.html?zenid=uah0g5r2l8p76bsof74rj5aje3
But I'd agree Mike or Dan are the best option for the RS2.
How long have efi been going, moons? Only ask as you don't hear much about them on here. But I know he has a cracking reputation