The electric assist off an Opel Corsa/Barina is a popular retrofit to just about everything in countries that have them.. if the US has them they will be GM chevy Buick branded small European style 1.2 litre 2 door or 4 door car
Apparently over here they're quite common in smaller Asian cars like Hyundais, Toyotas, Hondas etc. There is a thread on here from a few years back where someone outlined swapping the system from a 2000s Hyundai/Kia into a 60s Mustang to show how it could also apply to classic Mopars.
