The original pre-season gear is not present in-game.
As the realm will be progression-based, and apparently there's "illegal" characters in here that prohibits me from posting it as a bug report.
http://wowwiki.wikia.com/wiki/PvP-70
Prior to patch 2.4, the pre-season (season 0) PvP gear were "High Warlord/Grand Marshal" items that were purchased by honor points & battleground marks in Orgrimmar's Hall of Legends & Stormwind's Champion's Hall. These items in patch 2.4 were replaced by reputation sets.
The various pages within the wiki contains the costs of all items and to the NPC vendors they belong to. Example http://wowwiki.wikia.com/wiki/Grand_Marshal's_Vestments
NPCs:
(Alliance)
Captain Dirgehammer <Armor Quartermaster>
http://www.wowhead.com/npc=12777/cap...ammer#comments
Captain O'Neal <Weapons Quartermaster>
http://www.wowhead.com/npc=12782/captain-oneal#comments
(Horde)
Lady Palanseer <Armor Quartermaster>
http://www.wowhead.com/npc=12792/lad...nseer#comments
Sergeant Thunderhorn <Weapons Quartermaster>
http://www.wowhead.com/npc=14581/ser...rhorn#comments
