Hardwood garden seat, spares/repair (Digswell AL6)

A 4ft Seat, measuring in mm 1220w, 870h and 600d. Several of the seating planks have been reinforced during the ten or so years since I got this from another Freegler. Several more seating planks now need reinforcement or replacement. Wood looks like teak and has been treated with teak oil. I've now decided to buy a replacement seat.