What a difficult situation for you, you have my best wishes. Whilst Pusscat may be difficult to rehome, it might be possible to find a 'foster home', where someone would look after her whilst you are unable to, but you retain ownership, cover vet's bills and look after her when you are able. As she is elderly she may settle quite happily into two houses and not be worried about going outside. As other have said, advertise at the vet's, supermarkets, everywhere. Perhaps CPL might agree to carry an ad. for you?