I'll get this up today or tomorrow. The problem was taken off my plate; we rebuilt the machine, being unable to timely unpack the image, but I still think this is a problem that needs to be solved. Thanks for your help, Steven; more to follow.
If you're asking if I remade the image, the answer is also in the OP: No, I don't have the drive anymore; Dell took it back.
I saved it with the version baked into PartedMagic 2017; if you need the exact version, I'll need to boot it up, but it doesn't seem germane, unless you know something I don't. My original restore attempt, of course, was with the same version, as noted in the OP.
I tried using a 2015 version, but it wouldn't start up for some reason, on my T410.
Live 2.6.2-20amd64, actually, just downloaded this morning. Same problem: I navigate the mount until I can see the enclosing -img folder, and then say OK, and the menu only includes savedisk and saveparts.
This looks like the common problem -- and since it's so common, a structural fix seems indeicated -- but in my case I'd be happy with being able to restore this client's disk image for which Dell took back the original SSD. I cloned their original Intel 256GB SSD onto an ext4 partition on my Linux (U18) laptop, having booted from a 2017 Parted Magic disk, mounting the 370ishGB /dev/sda3 on the laptop as /home/partimag, and picking a root-level directory called /backups (created while booted to Ubuntu...
DBAN shouldn't nuke *itself*, however orthogonal that behavior is