There isn’t an “official” image of the single bay My Cloud hard drive that one can publicly obtain from Western Digital.
If the original hard drive still functions one could try to clone that drive to a new hard drive using any number of clone programs. There are various past discussions on using clone programs to try and clone a single bay My Cloud hard drive. For example:
Note that after performing the steps to unbrick that was linked to in the previous post one download and installs the latest WD single bay My Cloud firmware from the WD website.
