Dementia and hearing loss

Hello.  I am seeking advice on replacing hearing aids on a regular basis.  My mother suffers from dementia and loses her hearing aids constantly.  Sometimes we find them, often not.  I was getting a very good replacement service from Spec Savers, Middlesbrough. But now i have been informed that the NHS will not pay to replace lost hearing aids and the cost will be £60+ each for future aids. This is the basic behind the ear model. Thanks in advance.  A