Your article discusses primary mitochondrial diseases, which are genetic. I have seen four different mitochondrial specialists, because my testing has shown abnormal mitochondrial function. No one can find a genetic cause, but they do believe that my chemo drugs did damage my mitochondria. No one knows what to do with secondary mitochondrial dysfunction, although by far it is more common than primary mitochondrial diseases and is the basis for many diseases of aging.
As it is very difficult to get into any mitochondrial specialist, and if you do, to get anyone to help in any way, It's very unlikely that anyone would offer the treatment.
We have a multitude of mitochondria in cells. Depending on what kind of cell, the number of varies, but it can be into the thousands within a cell. Trying to transplant mitochondria into every one of your cells, or even a fair proportion is an unlikely proposition in the near future.
I have had a lot of help from using the strategies in the attached.