Contact the vet school at Davis--I believe that the have been involved in some stem cell research with Dobes and DCM. Can't remember the name of the vet who was working on this
For the OP, I knew 2 people who did the stem cell implants for dcm with their Dobermans in Florida. That was pretty early on in the research, and I don't recall them having much success. IOW, the 2 Dobermans didn't seem to get any longer than they probably would have anyway, but I guess that's all kind of subjective because who knows how long they would have had without it.
However, speaking for myself, I have personally had stem cell implants into my knees for severe osteoarthritis. It was very expensive, and I got absolutely no relief from my pain. That said, as it was really expensive there was only so much of it I could afford. Perhaps if I had more CC's of stem cells, maybe I would have had a different result. And maybe not. I guess I will never know.