I would just go with arnotts. They are really good. Just remember, after you finish installing the springs and you are ready to lower the car from the jack. Make sure to lower it really slow so that the sensor turns on and starts to inflate the bags slowly. I did this by letting the wheels barely touch the ground. As the bags inflated I would lower the car a little more. I'm pretty sure my first airsprinfs I installed broke because I lowered the car real fast and cracked the top of the spring. Good luck.
https://www.arnottindustries.com/