When you say "canvas," do you mean "cloth?" You can still find various cloth colors on eBay. Tressostar and Cateye still made it many years ago.
Here's a Cateye, which proved very durable. As a kid without much money, I would rewrap my Tressostar the opposite overlay when it became ratty.
Sticky side attaches to handlebar. In other words, I could not invert it with any success. lol
2 NOS CAT EYE 3000 BROWN COTTON bicycle handlebar tape bar wrap BAR END TAPE | eBay