Cortland, NY Pres. Church has a group called "P's and Q's" for "prayers and quilts". They open meetings with a devotional, then prayer requests, then work together. Sometimes on Charity quilts and sometimes someone teaches a new technique, or introduces a "how to" project.
Just talking about the group around the community is a good way to get donations of fabric, or put a note on Craigslist in the wanted section from time to time saying you will take scrap fabrics and yarn, fleece, batting, etc. Often people are downsizing or clearing out and will donate things. If you have a thrift shop in the area, ask them to reserve fabric and scraps for you. Sometimes they toss stuff like that.