If you don't want to match them � for � why don't you make them a book of vouchers of things that you will do for them. For example you can offer to mow their lawn, make them a cake (or afternoon tea for them and some friends while you act as butler/waitress), take them to a local house/garden etc.
Alternatively 50 small practical gifts - packet of nice tea bags, packet of seeds, smelly soaps etc.
I think when people have everything spending time with them is a nice gesture.
Alternatively ask them if they want you to make a donation in their name to their favourite charity.
Hope this gives you food for thought.