I have a 2002 EC 300 with the Gnarly (purchased in 2015) and the turbine core 2 (which came with the bike).
Last year, i did the "transformation kit" with the 2011-style plastic. I had to make small brackets to make the turbine core fit on the new subframe. The brackets were maybe 40 mm long, and I had drilled two, 1/4" holes to accommodate the old silencer. the new steel subframe is a bit wider than the old aluminum subframe, and a big taller, so the brackets took care of that.
Happy to have the transformation kit, and happy that the parts supply is / should remain strong.