I've not read about any successful treatment using stem cells to help neuropathy although there are a lot of stem cell clinics waiting to take your money for a lot of false hope (just my non medical opinion). Here's a discussion where members have talked about the topic.

Stem Cell Therapy for Neuropathy: https://connect.mayoclinic.org/discussion/stem-cell-therapy-for-neuropahy/

Have you looked into stem cell therapy for neuropathy?