You may want to see if there r any Durable equipment stores. Call and see if you can rent from them or do they know of a place that rents. If ur staying in a Hotel see if they have one u can use. See if there is a Red Cross that may loan out. Maybe members have more ideas.
Another option might be a local flea market. We went to one a few weeks ago and there was a booth with gently used wheel chairs, rollators, walkers and even a brand new bedside commode, the same one hospice gave my MIL.