I don't know about TENS systems specifically but there are many for sale. Just Google TENS system. I don't know what kind of system would be best.

I have a near infrared light therapy system. http://revivelighttherapy.com/collections/all-products Sign up for the email newsletter and they will send you a discount code. I'm using mine right now. I have the pain therapy system. I think it would be the one you want. I think the discount code is ' enjoy15nov ' They ship quickly. Got mine in 4 days.

BUT, you need to provide your body with the vitamins to support nerve health. The myelin sheath that surrounds nerve fibers grows/heals very slowly and needs B-12 and folic acid. Without healthy myelin, the nerve fiber is raw and will not heal.