Game Developer Ahmad Zabarah went on the forums today to announce that the top tier raid gear in patch 2.0, Underworld and associated mods, will not be craftable.
Grade 31 Ultimate Gear (No Research Available) | 03.04.2013, 11:02 PM
Hi all, just thought I would clarify some things.
At this time it is our intention that the best-in-slot PvE gear and Mods available are not reverse engineerable for schematics and not craftable at this time. Our goal is when new levels of PvE gear are introduced, the older gear and mods will then become reverse engineerable for schematics.
For the release of "Rise of the Hutt Cartel" Arkanian level gear and mods are the best craftable equipment in the game. Underworld level gear and mods will eventually be craftable when a new tier of equipment is released.