I know the MVVS .91 is available in rear or side exhaust. I do not know of any 120 R/E engines. I'm going to look at getting a 15x8, I think the 14x6 will be too small. Finding the TT120pro could be a bit difficult now as TT have discontinued it in favour of the side exhaust version! (why I dont know!)

Will let you know how it performs. I'm expecting good things.