Front and rear by APR. Not the same as what you asked for but similar and probably better
APR Rear Diffuser for 15-Current Dodge Challenger SRT Hellcat - AB-723500
I have seen many people spend way too much on all kinds of things. Some people just see what they want and get it like spending $20k+ on an engine when the one thats in your car is still working fine and they hardly drive it.C'mon, I was just pointing out most people do not want to spend $2,200 on parts like this....
The ZL1 pieces are like $500 and that is expensive......