Can you look for what you want mechanically without putting yourself into a sentimental corner about your old car? Do like Imdew said and lift one if you want some extra clearance. 2” is easy bolt on anyone can do, the 4 parts are made by various people and vendors and not expensive or you can often install struts/springs from other Subaru’s for s lift.
Air suspension is highly problematic with age. None of them are ever maintained at all, bags leak, there’s 2 dozen orings that can leak, solenoids that can leak, the pumps have multiple failure modes, and the tank sensors get corroded. They’re great in great condition but getting that on 30 year old used suspension is a shot in the dark. Sure, look for one, but being married to them won’t be easy.