Agree about move to digital cue sheets - when I create rides/tours, I'm downloading route to my Wahoo Bolt. Club rides publish GPS files on RideWithGPS, I don't think ride leaders even bring paper cue sheets anymore.
Back in the day, a local guy used to make and sell cheap cue sheet holders. These days I'd be outraged over how many watts the it was costing meI
bought one that looked like this, it is still in my garage somewhere: