If you are looking for places to source window a treatments, a great way to start is by browsing the houzz products section. There is a wide array of window treatment types and styles, as well as there is a huge selection of stores supplying said window treatments. If you don't come across a design you want, you will discover a huge number of stores that are most likely to carry something you do like.

https://www.houzz.com/products/window-treatments-prbr0-br~t_12520

Thanks, Annie. I was just hoping to avoid wading through all that because I like these just fine. But thanks.

Kate, you might try BallardDesigns.com -- I've seen similar curtains there before.