I have been deliberating the same dilemma. I am going with TS/Euro bumpers as well, and I prefer the exit-right exhaust layout rather than the exit-centre. TS bumpers are one-piece, unlike the America ones.
My plan is to modify the TS bumper for a right-side exit hole. I have 2 TS bumpers and the original V6 America bumper to play with. My options are DIY, where I would cut the exit 'hole' from the America bumper (or spare TS bumper), and graft it into the TS bumper, using fibreglass to hold it in position, and bog/fill any defects; then graft a blank section to replace the centre hole. I am confident I can create a flawless finish, except fibreglass/bog is of course prone to shrinkage, so the cut-lines may show through after a few months.
Alternatively, I will have it professionally done, using plastic-welding instead of fibreglass.
Either way, I will convert the TS bumper for an exit-right exhaust tip.
So far, I've started the conversion for the front bumper. Removing the box sections from the chassis that hold the America bumper is a PITA. I used a reciprocating saw, but angle-of-approach is difficult, and I did not avoid hacking the chassis a bit.