A lot of guilds take in everything from fabric to finished quilts for their charity work. We have about 4 groups we give quilts to and it all is based on the size. Our coordinator and helpers keep it all going. They bring packages of fabric, or cut pieces or tops or layered tops to the meetings or bees and we pick out what we want to work on. I give tops to a friend who quilts them and then we all jointly donate to the guild. Works out great.
I would contact your local quild(s) and let them know what you enjoy and whether they can hook you up. Or call around to your local quilt stores with the same question.