Vintage Tent Trailer Where Can I Get Replacement Canvas For A Vintage Pop-up Tent Camper?

Where can I get replacement Canvas for a Vintage Pop-up Tent Camper? - vintage tent trailer

A friend has a pop-up camper old crop. This is a "Nimrod" from the year 1968. (Oh great name?).

The canvas is old, broken and rotting. However, the trailer is in very good shape. If I can I will make a new canvas camper old crop for my family. Any idea where I can screen new version? Thank you!