I don't understand why this uniform is Fed only; why not allow your KDF users to purchase/use it as well? It'd be a great looking uniform for that faction, and most of the work is already done. Easy sales FTW, right?
I asked the very same question in one of the last 'Ask Cryptic'. Stahl replied that they don't intend of releasing any current Fed costumes for KDF, but there will be new costumes for us in the near future. Considering Cryptic's history with such statements we'll probably never see a KDF specific costume release for c-store (I don't count the academy pack as KDF specific because it's content is also partly available to Feds), but maybe for the lobi store as single character unlocks (meh).
It's a shame, really. There are already lots of NPCs on the KDF starbase wearing the mercenary uniform so I don't understand why they would exclude the playerbase from having them too.