I found it initially at the US site, but was also able to find it at the UK site:

https://www.thomann.de/gb/thomann_gi...bass_jumbo.htm

It's not quite identical to the one I found in the US, primarily because the Thomann bag is a tad shallower. The Thomann is plenty deep enough for the ESB-4, though, at 13cm. The one I found here has the same length, width and 20mm padding, but is about 7cm deeper. So I will need a thicker piece of foam to stuff it with than JimC will ;-) I like the Thomann better, but paying the shipping would have been like buying it twice for me. Meanwhile foam is cheap...