Hello!
Would appreciate a copy of a Kobo Clara HD (249) image as well!
My KOBO seems to have become corrupted, stuck on three dots booting no matter what I do.
I've tried to copy the image over to another SD card with the same result. I installed
Quill-OS instead which works! Though the support for clara HD isn't great and it's feeling significantly slower, so would love to have the original OS restored.