Which leaf springs to use?

Are the super stock springs still available? Who's making them these days?
I bought mine from Summit at the end of last year. Mopar part numbers and Made In Mexico stamped on them. Luckily I like Mexicans so it doesn’t bother me.

Mopar Performance P3412003 Mopar Performance Competition Leaf Springs | Summit Racing
Mopar Performance P3412002 Mopar Performance Competition Leaf Springs | Summit Racing