Thanks, but unfortunately he's not so experienced on the hardware side, so preferred option is to find someone nearer to him than I am, who could help with imaging.
Further info I should have given, disks are almost certainly soft sector, are probably CP/M (so SSSD probably) but could be UCSD P-system or even Ai's proprietary OS.
Therefore, preferring flux imaging so that we can experiment on the images to see what sort of file system could be present.