Back Pain Support Group
Back pain is one of the most common reasons people seek medical care. In fact, about 3 in 4 adults will experience back pain during their lifetime! The term back pain includes pain affecting the neck, midback and low back. Acute back pain may begin suddenly with intense pain but typically lasts fewer than three months. Usually, chronic back pain is persistent, steady, and...

I went to a store called The Back Store, now called Relax the Back (
www.relaxtheback.com
I think it's part of a chain of stores that are dedicated to giving people with back pain good chairs and other things to help them.
Or you might check online for recommendations from them.
best wishes
plantcrone