Do they make such a thing as a one-handed walker or rollator that a person with a shoulder injury could possibly use?

My mom broke her shoulder today and is now totally unsteady on her feet. (partially due to all the pain meds they shot her up with)

My dad had me go out and buy a transport chair at Walgreens to use to help my mom get around the house. It's easier to deal with than the ginormous wheelchair that she has for when we take her shopping on bad-knee days.

I cant wait till my mom's shoulder heals, and I'm sure she cant wait either. But it's just nasty to watch her be in all that pain. Hopefully she heals quickly.