It would be simple to make your own custom timer with a $20 audio cassette recorder.
I haven't done E6 myself in years. But, when I did, I made a tape with all of the timings, warnings, instructions, etc. To fill in the spaces between steps, I picked out music that I was familiar with and could tell when the next step was approaching by the music. It worked great!
Without the need for music, any recorder would do.
I once saw a fellow flying his model plane with a talking countdown timer. It was so cool I had to get one for my darkroom. Radio Shack has it adn it's cheap. I love it and couldn't go back to my old stop watch.
Radio Shack Catalog number 63-877 talking timer.
Anyone can make a Digital print, but only a photographer can make a photograph.