I'm not. But I knew the right people to talk to.
First, I asked a friend about a pattern. She didn't have one per se, but had created her own after not liking any of the patterns she'd seen. She offered to walk me and E through the process. (After E mentioned it, I decided I needed a garment bag too).
And then I called another wonderful friend who makes custom draperies, etc. and has a really great stash of decorator fabrics. Not only that, this friend is nice and very generous with her stash. E and I went over to her house one night and she showed us the fabrics she had. E and I both fell instantly in love with one of the fabrics in particular, and fortunately, there was enough of it that we could both get a bag out of it. When we mentioned that we were going to head out to the store to get zippers and thread, my generous and nice friend scoffed at that idea, and sent us off with everything we needed from what she had in her own supply. She completely hooked us up.
We spent two evenings working on these bags. Once they were done, I left mine hanging in the living room for about a week and a half--for me to easily admire each day.
Here's the pictures of the final product: