A buddy of mine did it and it was expensive!
RTR deck lid panel was $200
2013 tail lights were $750 used
2013 rear bumper was $450
Gt500 rear spitter was $150
Borla S-type quad exhaust was $1000
And RTR license plate surround was $200.
Soo if you got a 2013 deck lid panel you're looking at 100-150 easy for a used one. And skipping the boss splitter and quad exhaust will save you some but won't look anywhere near as awesome. All the stuff bolts right up, but my buddy got lucky finding a bumper for $450 that matched his color. Soo good luck lol