Champion Isimode <Triumphant Armor Vendor> can be found with the other tier 9 armor vendors just west of the Crusaders' Coliseum between the Silver Covenant and Sunreaver Pavilion on the Argent Tournament Grounds in Icecrown. He sells Heroic-level (ilvl 258) tier 9 to members of the Alliance.
See also
His Silver Covenant compatriots are:
Aspirant Forudir sells Conquest-level (ilvl 232) tier 9
Valiant Laradia sells Triumph-level (ilvl 245) tier 9
Arcanist Asarina <Emblem of Triumph Quartermaster> sells item level 245 weapons and armor.
Isimode's Horde equivalent is Champion Faesrol.
Vendor information
Sells item level 258 (high end) Tier 9 armor set items.
Notes
Isimode's name is a homophone to the term "easy mode", which, along with Faesrol (face roll), are common forum insults directed at either the difficulty of PvE content or the skill level required to play a class competently in either PvE or PvP.
He is probably the only known in-game high elf paladin.
Patches and hotfixes
Patch 3.2.0 (04-Aug-2009): Added