Currently there are no tier 5 KDF Zen Store ships that have been made into Fleet Ships, which means none of the KDF fleet ships get a discount. Perhaps there is a Tier 5 Zen Store ship that you would be willing to pay money for a fleet version of it.
There's not as many choices for the KDF as there are for Starfleet but the following ships could be made into fleet ships:
Fleet Varanus, please; we really, REALLY need this.
Starfleet has loads of awesome science ships, and we only really have one so far. I'm not counting the Tholian stuff, since most people will never be able to get one. I'm also not counting carriers, since they're a whole different animal, and I really don't like flying them.
Even at the discount price, 5$ per character is still too much for me to justify spending to get an extra console and some extra HP. Outside of PVP, the advantages are superfluous and the current c-store ships work perfectly well for pve.
Oh, and that Varanus I mentioned? At least a LtCom Tactical station. At least. It already has plenty of science and engineering powers. So give us a LtCom Tactical Boff station, and an extra Engineering or Tactical console, please.