Two ideas: BacksideFabrics.com lets you order up to 10 swatches at a time, free. With fabric.com I once needed to get 12 different shades of solid blue for a project. I called them and we went through their blues together, I ordered way more than 12 pieces of the amounts I needed, and when I got them, I chose the ones I wanted and returned the ones I didn't. They were fine with that, and I got free return shipping so it didn't cost me anything to shop through their blues except paying for the fabrics I wanted. That was a few years ago, so you'd have to ask if they still do that.