Is there a morphagene clone made for ER-301?
No, not that I know of.
I think generally the spirit of the community is more about implementing (and publishing) units that are focused on new creative approaches to certain tasks one has in mind — rather than cloning existing modules. they can be inspired by other existing concepts, of course
one laserdj over on lines wrote up a short walk through for a morphagene patch.
Depends on how deep of a ‘clone’ you need but you can get a lot of what morphagene does out of the manual grains unit alone.