Handicap Shower Seat Renting Handicap Equipment?

Renting handicap equipment? - handicap shower seat

My mother is visiting next month and he has MS and is in a wheelchair or scooter. There are more than 3 steps to my house, and there is no problem here, too shower. Has anyone any idea how a safety rail, or could rent one? Also if anyone knows if there are places to rent in walker (you can use in the morning) and a seat in the shower?

Any help is welcome!

Thank you!