I've found at least three different companies that have released new toy lines this year that are close to the old Car Wars scale.
First, Johnny Lightning has release Micro Strike vehicles. I can't find their official page, but here is a page that gives a good overview.
https://toybook.com/tfny-tomy-celebr...ke-collection/
Second is Jada Toys the maker of those fine Battle Machines. They have released Hollywood Rides. These are hefty well made models that you'll want even if you don't play Car Wars.
http://www.jadatoysinc.com/products....ollywood_Rides
And finally, Micro Machines are back! They may not have the same quality of old, but they're fine for kit bashing a few Car Wars vehicles. Again I couldn't find an official website but here is a good overview.
https://www.topspeed.com/cars/car-ne...-ar187829.html