If your sofa is looking a little tired and has seat and back cushions, then you can get replacement cushion pads which will give your sofa a new lease of life. (idealhome.co.uk)
Definitely try a Google search for replacement cushion for your make / model swing (I found a replacement canopy for mine that way on Amazon). (diyshowoff.com)
Ballard Designs represents that the sofa has replacement cushions available. (ballarddesigns.com)