Three wheeled Rollator/Mobility walker (Scott's Green DY1)

I was recently gifted a 4 wheel rollator and its great for taking to the shops but really awkward in the person flat as it a bit wide and impossible to turn around, so I'd be most grateful once again for anyone's help in a acquiring a three wheeled Rollator/Mobility walker for a friends 83 year old mother as these are narrower and would be much easier to navigate her small flat, especially the kitchen and the bathroom sorry to ask again and big thanks to Carl for gifting the 4 wheeled one which will get used around the supermarket/shop and perhaps a walk in the park.

Thanks so much - George.