In Epic:Armageddon, the Warp Hunter is now for all intents and purposes, the Cobra, with the following statistics.
Code Sample:
Cobra WE 25cm 5+ 6+ 5+
Cobra D-Cannon* 30cm 2BP, TK (D3+1), FxF
Shuriken Cannon 30cm AP5+
Eldar Missile Launcher 45cm AP5+/AT6+/AA6+
DC 3, Skimmer, Reinforced Armour
Critical Hit Effect: The Cobra’s gravitic drives implode, sucking nearby troops into an energy maelstrom. The Cobra is destroyed and any models within 5cm of the
model suffer one hit on a roll of 6.
* Cobra D-Cannon: This weapon counts as having the 'Ignore Cover' special ability against war engine class targets
Not being familiar with Epic 40K, I can't help much with conversions back, but above, it's got a Shuriken Cannon and the Eldar Missile Launcher. The Shuriken Cannon in E:A is the same as that used on the Tempest (Scorpion), and the Eldar Missile Launcher the same as that on the Revenant Scout Titans. I can't vouch for any other changes that may have been made between editions. Someone with more familiarity will have to help out there.
Morgan Vening