Now this is just a "Hmmmm, that might work". kind of question, so no flamey me. Bracing is done to keep the panels from moving, by pressing from the inside out. Could you do the same thing with a small piece of braided wire and a turnbuckle drawing the panels inward? Just drill a hole in the panel or use a fixing point on the inside, anchor the wire and use the turnbuckle to tighten to "spec", then Loc-Tite it in place.