llove, when my parents needed to have grab bars placed in their bathroom, they called their favorite plumbing company that was familiar with the process. This was an out-of-pocket expense for them.
Try American's with Disabilities. They came to our home and installed hand rails going out to the back yard where my dad loved to BBQ and going down the 3 stairs from the kitchen into the garage. They used re-purposed wood and didn't charge us although we made a donation of our choice.
Not difficult I did mine myself.