EA-EL seats, including long wheelbase Fairlane seats, are all interchangable with varying degrees of elbow grease.
AU seats would presumably have different rails, so you'd need to use a little more imagination.
My recommendation would be sourcing EF-EL seats from that same wrecker.
Jack Travis, E-Series Acting President
1989 Ford Fairmont Ghia turbo/GL replica (underway)
1994 Eunos 800M
1990 Ford Laser S