I'm pretty sure you can bind mount /proc, /sys, /dev, /run, chroot and then update-initramfs to regen.
Thanks Tim. You make it sound so simple.I searched for "chroot to mounted disk to update initramfs" and found several detailed descriptions of the process.
https://forums.debian.net/viewtopic.php?t=143279 Thank you so much. I will give it a shot today and report back. Cheers. -- Andy Dorman