First, welcome to FT.

Second, this is the right thread to look through for reservation codes that might be able to help you get a lower rate, but all the publicly available rates that we know about are listed in the wiki (at the top of this this thread.) So read through that and try all of those codes.

If none of those codes help you enough, you might check out the http://www.flyertalk.com/forum/marri...rsion-brg.html thread.