This will sound strange, but try it. Go to a fabric store (like Joann's Fabrics) and look for a pattern for (roman shades). They are simple to make and with the right items, can be done without a sewing machine. Sewing machine would be better, but it can be done without.
Check out what material they have, look on the internet, there are places that sell it by the yard. and see if you can do this.
Good luck. Lynne
Love the sunshine and warmer weather!
Lynne and Jerry RVM 105
2004 Winnebago Itasca Sunova / 2012 Toyota Prius / 2016 ACME EZE-Tow Dolly