Hi, I'm Sadique. Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP.
Please go to this link to buy the drum:http://www.brother-usa.com/supplies/accessoryList.aspx?Model=MFC9130CW
Please go to this link to access the user guide on how to replace the drum:http://support.brother.com/g/b/faqend.aspx?c=us&lang=en&prod=mfc9130cw_us&faqid=faq00000154_057
Is there anything else I can help you with?
Please rate my service by clicking on one of the stars at the top > then click Submit.