Air Ride Technologies sells a bag over shock setup, they call them a 'shockwave'. I'm sure others sell them too, but I don't know who, or what they call them.
Bummer about the shockwave is it's kinda spendy, but if it's what you need.....
AND YOU CAN FILL THEM WITH HELIUM!!
just kidding.
But I HIGHLY recommend sticking with Air Ride Technologies, you will be money ahead in the long run. I've had dealings with the other shysters.
