Air bag upgrade

I have a 20 year old airbag system in my 51 Mercury. It's been really reliable with minimal issues. That said, I think it's getting long in the tooth and needs an upgrade.
What advances have been made in the last two decades and where do I start (parts suppliers etc.) to get the ball rolling. Thanks for looking, Bumpstick

 

My pops replaced the standard style air ride system in his 59 Chevy with a fancy computer controlled kind. From what he’s told me, it sounds like a lot more trouble with no benefit.

I like the KISS method on mechanical things.

 

Used the Ride Tech system a couple times
Worked great. EZ to program

might want to post this on the off topic forum though

 

Since you're asking on the H.A.M.B., how about steel springs?

 

This will get deleted or moved to the off topic forum soon.