I have the SX/4 "lil bro" to your wagon down here in San Antone as one of my long put-off project vehicles. I redid my headliner so long ago, it should be coming down any day now. The Texas heat kills headliner foam and adhesive. I don't think I would attempt to do it myself, again. You found a great price deal, there.
Also, I have a vehicle with a tan perforated vinyl headliner adhered directly to very thin plywood, probably a home-done job by the previous owner, and it matches the seat upholstery vinyl. Its an appropriate look for the type of truck it is.