Hi Princess Sue, if you find out the answer to that one I would be very interested! I just bought a swing seat frame off ebay for a �5. The previous owners had the same problem with a ripped, rotten base and they just went and bought a new one, taking all the cushions and covers off this one. Today I assembled it and I "wove" a base and back support out of very long lengths of that green very strong polyester garden string. It took a few hours but it is strong and firm enough to sit on. Now I just have to buy the foam and make covers for them and the sunshade!