I'd love to know what other cases zitherists are using. In the meantime, here's a "zitherbackpack" that Altieri Instrument Bags out of Colorado made for me. I've been taking it on my scooter around town to check it out and it seems pretty practical- although a belt strap would have been helpful for balance, and maybe thicker cushioning (it's about 1/2")

That is a *beautiful* instrument, and an excellent case.

I don't travel, so I continue with the original wooden case for mine: