Old solid sofa bed in need of strap replacement (Ealing W5)

Very solid, very heavy - made to last, and it has! The rubber straps all need replacing, although the mattresses are still relatively comfortable. However, neither have fire labels, as this piece of furniture is very old. The overall size is approximately 2020 x 820 x 900 mm folded. The width is approximately 1800 mm when unfolded.