Obsessing over these gorgeous bags made from vintage canvas paintings by Swarm / leslie oschmann. You could do something similar but use fresh canvas and paint one of your designs or something else on them. Make a bespoke size and add leather handles.
(no content on link, good visual idea) While I'm raiding every Goodwill in town this weekend for 'stuff' I'm adding Canvas Paintings to the list! Noone EVER buys them, so they're dirt cheap. Here is what can be done with them: Painted Canvas Tote Bags ;