A Company in Brazil called [link=http://translate.google.com/translate?hl=en&sl=pt&u=http://jetfibra.com/&sa=X&oi=translate&resnum=1&ct=result&prev=/search%3Fq%3Djetfibra%26hl%3Den%26sa%3DG]Jetfibra[/link] used to make a replacement canopy for the 81". It's not on their list now, but if you email them they may still have 1 or 2.