Futon sofa bed (Stirchley B30)

I have owned this since the mid 90s. The wood frame is still in good condition. The futon has compacted and is quite heavy/hard so needs replacing. It's a sofa bed for younger people really and I am now middle aged so I want it to go to a good home.

As a bed, the frame is L190cm by W143cm by H30cm. As a sofa, the frame is L100cm by W143cm by H75cm. There's a wooden tray on wheels to store bedding underneath.