@evanskaufman If you using Linux, how about ddresucue?
https://wiki.archlinux.org/index.php/Disk_cloning#Using_ddrescue
@sharow My primary computer is win10, but this looks promising. Thank you!
@evanskaufman dd and lz4c? It is kind of DIY. I'm not sure about recovery with a new disk geometry however. 
Trying to image a NAS drive (the first of 2 in a JBOD, the second of which died). I know total recovery is out of the question, but I want to image the non-bad drive before I format & redo the whole thing as a RAID 1