take a look at http://www.trailertech.com
they offer both a 7 x 12 and a 7 x 14 model.
alex is very good at custom designs and he saved us a bunch of bucks by modifying their tt818 to meet our needs. the big upside is they not only tow well but they meet florida standards for MFD.
ours is over 3 years old now and looks as good as new.