if she needs one then get the occupational therapy to assess her and they will supply and fit free gratis and for nothing.
if you dont want to wait,and you buy one from ebay ,gumtree then there a doddle to fit assuming its the one that the runner rail just screws onto the stairs and not the rear wall,and any spark will just put an extra 1 fuse consumer unit…doddle.
theres plenty 2nd hand on ebay bidding now??
ebay.co.uk/sch/i.html?_from … t&_sacat=0