I found it doing a search for spine chart dermatomes. I believe most are chiropractic based.
here is a results page of them -
https://www.google.com/search?q=spin...w=1360&bih=624


If you have mostly mild spine issues, soft tissue can cause quite a bit of pain/symptoms.
triggerpoints can cause referred pain /symptoms
muscle imbalances or slight misalignments could be an issue also
even poor posture can create problems

If you haven't been assessed by highly qualified PT/ chiropractor, I would ask your MD for referral or seek one out yourself, just to have a better idea if some sx might be treatable with proper therapy.