You have my sympathy.

I don't know of any stem cell treatments which have been shown to work for neurological problems. This has not stopped "clinics", in exchange for lots of $$$, selling unproven treatments.

Some good work is going on, mainly in the areas of MS and Parkinson's Disease. This is at early stages; proof of principle or very early (Phase 1) clinical trials.

I hope that this is successful; evidence-based stem cell therapy would be excellent for people with either MS or PD.