Richard,
You might like this zipped bag a few of us in VK purchased from an outdoor/camping chain called Kathmandu. I visited their London shop in 2016 but I think they closed their UK outlets.
The bag was probably intended as a camera bag. Camera bags from photographic shops are still a good source of padded bags, even those intended for GoPro type video cameras.
It is big enough for the FT817, a small battery, a Pico keyer (memory keyer with speed control on the front panel), the microphone and compressor. In the top cover section there are the ft817’s antennas, a Rite in the Rain logbook and a few spare pens.
