seal/badge help

I'm doing cosplay as Daishi from the Roman Hikou PV and I was wondering if anyone here knew where to buy or how to make the seal that he has on his blazer.

Example:
http://img.photobucket.com/albums/v75/psycho_le_cemu/Roman%20Hikou%20PV/romanhikou41.jpg
http://img.photobucket.com/albums/v75/psycho_le_cemu/Roman%20Hikou%20PV/romanhikou20.jpg
http://img.photobucket.com/albums/v75/psycho_le_cemu/Roman%20Hikou%20PV/romanhikou19.jpg