Two options mate,
Miltek do the setup you want for the standard car of the r32 style and it fits in the same place as the standard box, only difference is you have to cut a bit of plastic by the tank to allow one of the pipes to get round otherwise it will drape to low low.
Other option is custom build which will be a cheaper option unless you can find the miltek 2nd hand for a good price.
You can cut the standard rear valance and poke the twin setup through without getting a r32 style bumper, "vwprime" has done it on the forums, eventually this is what I want to do as well.