Might try here, https://www.performance670.com
If not you ought to try and get in touch with the YouTuber RedBeardsGarage, Or, Cars and Camera's .They're the brain to pick on all the predator engines.
Ive put 1800 miles on my 2017 Cub challenger from yardwork to Colorado mountains. Built like a truck. Nice price range, loaded with all you need. Go for the 2019 and up to get the upgraded exhaust. Only downside is top speed of 45 mph.