Hi folks looking for some money saving advice. A few years back my wife and i got perfect fit blinds on our double patio doors and we love them but due to decorating my wife now wants white aluminium ones instead of the natural wood ones. The frames are in perfect condition but the local blind company we used still wants £250 to replace them so i was wondering if i can just replace the blinds (not the frames) and if so are they a specific type of blind?