Where can you find a replacement canopy for a canopy swing purchased at Menard's?

There is a website that makes replacement swing cushions and canopies for patio swings sold at Costco, Wal-Mart, Target, Lowes, Sears, Home Depot, Wal-Mart, and other retailers. See links. They're made with Sunbrella fabric so they will last for many many years (Sunbrella awning fabric comes with a 10 year warranty). They have a good selection of fabrics. They seem to have a very large selection and cover just about every model.