My insulated hot tub cover is falling apart though the foam inserts are still not saturated so the cover is useable. The tub is 18+ years old and I don't want to sink any money into it. The cover size is 80 in. x 80 in. I have searched resale sites like Kijiji and found used 82 in. x 82 in. lids for cheap but nothing that is 80x80. Is it worth getting the 82 in. x 82 in. cover or will the energy loss make it not worthwhile? Thanks for the feedback. Keepingwarm.