Well, you really have only two options at this time. You can use the Early clan Era FRR Affiliation from ER 3052, and replace the Hatred of Mercs Compulsion with Hatred of DC, and swap out the various "Any Lyran or Draconis" with "Any Draconis." That should work fine for what you're looking for.
Or you could use the Rasalhague Sub-Affiliation for the DC Affiliation in ER2750. Sure, its about 300 years early, but there isn't a whole lot of major changes between 2750 and 3025.