If you want a traditional CoS sigil of Baphomet, you may be out of luck for now. From what I remember, the quality from the original jeweler who made the ones you see in images of the hierarchy slipped so they stopped ordering them. I also remember their site being pulled from the CoS source list, and stories of a rather rude response when contacted about them. I stand to be corrected.

If you want something custom made many have had success with Mark Defrates' pieces. I have no personal experience with him, but from what I've heard and seen I would be comfortable ordering from him. I like looking at his site from time to time to see the new work. His site is http://www.markdefrates.com/

For what it is worth, I would also like to see an official offering.

I hope this helps.
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Mein Leben, Meine Chance