The reason why is that Kaiba, Jounouchi, Yami no Marik and Yami no Yugi were the top final duelists in the Battle City Saga, which was probably when Yu-Gi-Oh!'s popularity was at its peak. Bakura was, unfortunately, knocked out in the semi-finals, not to mention didn't come back until AFTER ALL THE FILLER.
I don't want a figurine. I want something wearable. The best I can hope for is something custom-made.