You wouldn't want to replace the original OEM splitter with another one even if it was available. It is badly designed with thin plastic that cracks easily.
https://www.camaro6.com/forums/showthread.php?t=516368
I have the newer style Ikon splitter that's a reproduction of OEM just without the flat bottom, and in 3 pieces (like on the C8 Corvette) presumably to reduce shipping cost. I consider them consumables on this car so idk if it is worth paying extra for an expensive brand like ACS when both brands are made of ABS plastic.
https://www.ebay.com/itm/284648502349
The Ikon has held up ok for me after lots of track days with just some slightly visible scraping (if you're within a few feet) on parts of the bottom front edge which actually might have been caused by street driving rather than track driving. It mounts with just the stock bolts and provided self tapping phillips head screws which is much faster/easier than the 3M adhesive strip used on the original splitter that came on my car. The Ikon splitter has stayed in place at almost 150mph on track. I did remove the one remaining small bottom plastic edge cap piece after the other one fell off while driving on the street shortly after I installed the splitter. It looks the same with and without those pieces.