There is a vendor on Etsy that makes a really well done cape, look up summerwoodcrafts. She is very friendly and communicative and not only offers some excellent fabrics, but also will make it in another fabric if you message her, I chose this fabric from StoneMountainFabric
Boiled Wool/Viscose - Charcoal - Stonemountain & Daughter Fabrics
It’s currently out of stock but is perfect and would be worth the wait