If you are looking for a so called half case.
Send Ebay seller "Mr Zhou" a message.
He makes half cases for a variety of cameras.
One of his existing half cases may fit closely enough for the electro.
He has cases for the Zeiss Ikon and Voigtlander R series as well as Leica M's and Konica Hexar/AF.
I don't know, maybe he has a pattern for the Electros as well.
I had an exchange with him a few years ago. Good guy. Quite responsive.
I used his cases on an M8 as well as Zeiss Ikon in the past. They are actually quite nice and priced right at under $75.
The Original Older "solid" leather case frontman describes above is also a good option although, it does have the screw button on the bottom to attach to the tripod mount.
Usually plenty of those on eBay. Jus hope for one that is not too smelly.