I recently contacted the company behind these felt synth and gear covers on Etsy to find out if they might make one for the Electra One. I forwarded the link to the hardware 3d model that Martin had previously posted here. Amazingly, they agreed to add it to their catalog, and here it is:
I have ordered one, and waiting it to be shipped the UK in a week or so time. I thought others here might want to try it out too. I will post a short review here when it arrives. Its not the same protection as something like a Decksaver, but looks like it will keep the main panel and display safe from dust and minor accidents / spillages.
Disclaimer - Michal from Wavetable has refunded me the price of my own cover as I helped to set it up. I have no other involvement or financial interest in this beyond that.