The adaptor for the Gen2 is just a relocation bracket to move the stock caliper outboard for use with the 320mm rotor. On the Gen1, EM's has an adaptor to use the "SV" twin piston caliper with the 320mm rotor.
Since the Gen2 already has a twin piston caliper, there wasn't much uptake for the Gen2 SV caliper adaptor. On a Gen1, the SV caliper, EM adaptor, EBC 320mm rotor and ss line (russel from EM for me) is the bomb. On the Gen2 just use the 320mm EBC with the SS line and stock caliper relocation bracket. The SV caliper IS better than the Gen2 but not enough to bother with unless you want that extra 5-10%......and, at this time, I believe your only option would be to build your own bracket.
My stock MC's work great with the SV caliper; they only affect effort anyhow.