I would like to travel with my Etherwave; the current case I have for it is OK but not perfect.
I see there is a nice gig case for the EW here for not much money:
https://www.amazon.ca/Moog-Etherwave-Theremin-Gig-Bag/dp/B000W02786/ref=asc_df_B000W02786/
If you have one of these and like it or don't, I'd love to hear from you.
If you know of something better, I'd love to hear from you.