I am not aware of a Feklhr with more polies than the SFC one. This is certainly a major impovement over the ST: Armada I version.
As for higher poly Taldren Romulans go to SFU and the Romulan Legion DD by Moonraker is there retextured by me. Moonraker did a SFC1 compatible STOCK RBB (no idea where to find that), the Legion RDD, the Garuda RCA and a variant of the RDD with upwards pointed wings. If anybody has these, perhaps they should pass them on to WickedZombie45 or Moonraker for inclusion on the Moonraker's Models site.
KF