This is some idea for Fury items: Items available for and only to Fury champions:, , and . There will be more items ideas tomorrow.
Furious Soul is a basic item idea. Increases maximum Fury cap.
Blade of Fury is a basic item idea almost like the current but to fit Fury champions. The bonus damage from Powerful Strike makes trades better. This increases the champions' kits: increases damage and crit chance for Trynd, more upgrade skill for Renek, and lengthens Dragon duration.
Furious Axe is an upgraded version of Blade of Fury and an advanced item. It also increases up to 25 Fury come late game.
Furious Axe Recipe
Cape of Fury is a basic item idea. While Blade of Fury focus on damage, Cape of Fury focus on defensive stats. The bonus healing will give you more sustain.
Furious Shield is an advanced item idea, a Fury version of . It works well with Warmog's Armor. A level 18 Tryndamere can heal for 943 health with 125 Fury with Q and regenerate 56 health per 5 seconds.