A pinion mounted E brake is a good alternative however remember if jacked up they are not functional. Be safe.
I did some research on the Ford 9" and Ford 8" rears and what I saw was nothing that would fit the AD without cutting axles. Currie Enterprises offers several options (link below) quite pricey but dependable stuff.

http://www.currieenterprises.com/cestore/all9inford.aspx


~Jim