Unfortunately, due to a bug in Nova, it is currently impossible to give a discount on outfits without creating seperate outfits for the lower-priced versions. Ships can be discounted, though, and that works by creating a ränk resource:
PriceMod Used to modify the prices of items and ships at planets owned by
the affiliated government. A value of 100 equals 100% of original
price (i.e. prices are unchanged). Higher or lower values raise
or lower the prices correspondingly. (can be used to let
distinguished players get special deals on ships and items at
"friendly" planets that have granted them the rank)
To prevent a rank from showing up in the "Honors" section of the player info dialog, simply don't give the resource a name (or begin it with a semicolon).
And no, I don't know if that bug will be fixed in 1.0.9.
Edwards