What a great idea! Not sure on the pattern but wanted to suggest calling your local quilt guild to see if they can help you make them. I know my quilt guild always does charity projects and man can we turn out some items in a matter of minutes. :)
I took the liberty of searching in your area. I hope this one is near you.
http://midvalleyquiltguild.com/
Bless you for what you do. I have had friend's love ones develop Alzheimers and it can be very trying to keep their minds active and busy.