No, not all air suspended Discos had ACE. Mine doesnt.
You'll need the bags obviously and fitting clips. Are the ride height sensors still on the radius arms and connected? Is the compressor and pipework still on the vehicle? Would be under passengers floor, hopefully the pipework to the rear will have been tucked out of the way somewhere. But you have to ask why was it put on coils in the first place - failed compressor?
And once all that lot is back together the ECU has to be programmed to work on air again.