Wilmington Fabrics makes some beautiful basics in pre-cuts. Here's a link:
https://wilmingtonprints.com/fat-quarters The 5 Karat Gems are 5" squares. They come in 10" squares and 2 1/2" strips, too. There's a nice green selection. You just have to find them on Etsy or somewhere. Or get a local shop to order them for you.