Concertina Blind Ikea Hoppvals (Nine Mile Burn EH26)

Blind is 1.2 Metres wide and in perfect condition with all Fittings, instructions and packaging. The lift mechanism is by chords and spring in the upper section. One of the chords is frayed and catches on the inside of the blind which has to be retracted manually. I have taken a photo of the mechanism. Anyone with a new thin chord and some dexterity could replace the chord within the mechanism.