Our new line of Camaro specific ARC-8 wheels will have exactly what you are looking for. 19x11" ET11 and 19x12" ET41 to replicate the ZL1 1LE setup. The Group Buy for these wheels has just launched last week, more info here:
https://www.gangup.com/apex/apex-cam...s-q2-2019.html
Weights for that setup will be about 24lbs for the 19x11" ET11 and just over 22lbs for the 19x12" ET41. That particular 19x11" is heavier in comparison due to the large offset which requires a thick backpad. 19x11" ET43 (rear wheel) is 21.8lbs for example.
As far as I know, there are no other flow formed wheels out there in the ZL1 1LE specs. MRR does not offer a 19x12", nor could they do a +11mm offset wheel last I checked.
- Cory