I just got one myself. Before that I made my own and it worked nice. Now it’s got little burns and wax on it 
I did mine from a red twin bed sheet I got cheap at a thrift store and black acrylic paint. I started with E.A. concept as a base, enchanted it to his spirit, added Chinese Bagua symbols and the symbol form the circle of pacts.
@rehoboth_night_watch check out he pictures of other member’s circles in this share post:
I just saw a good post a lot like this one and I’m merging them and updating the title so more of the info is all together. Now you can scroll up for more ideas.