You could join Imperial Vengeance which is an Empire/Trade Federation based clan. Though at the moment it's more strongly influenced by the Imperial theme, if more Trade Federation players joined that might change.
It's a brand new clan, not many players yet. We're definately looking for some new recruits
According to the "history" I made up for the unit we were advisors to the Trade Federation in the pre-empire days. Once Palpatine was done using the Federation he pulled us out and we quietly became part of the new Imperial Army. After the fall of the Empire we reactivated leftover Trade Federation factories to help replenish our troops.
You can check out the site here: