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As for as the canvas, there is a recent thread from a place that still makes them
here http://www.steelsoldiers.com/showthread.php?162329-HMMWV-CAMO-Soft-Top-Cargo-Cover-Manuf-Interchangeability
here is a link to the site http://www.bretonindustries.com/
You may get lucky and find a cheaper...