Well there is multiple options... if you want MAX INT and by this I mean 1 int over 9 crit and what not then you would want something like
Spellpower Goggles
Grounding Chocker
Slime-Encrusted Pads
Cloak of the Clarion Call
Black Velvet Robes
Silver thread cuffs
Devout Aurastone Hammer
Mystic Tome
Discerning Eye of the Beast
Discerning Eye of the Beast
Charged gear of Intellect
Charged gear of Intellect
Corpse Rompers
Gaze Dreamer Pants
Keller's Girdle
Enumerated Handwraps of the Vision
Again, this is a fucking retarded build as what I thought u wanted was damage but then you wrote MAX int, so here you go lol replacing 9 crit for 1 int and going weird ass pants for 13 int and loosing haste / crit sta and what not but this will probably gain you the most intellect without gfd enchants. My druid at 29 has 329 SP scaled in bgs and sure I could go more yolo with these pants if it werent for my GFd encahnts, and I sit at 2.8k hp unbuffed.
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loom legs and shoulders give more int
Heirloom shoulers 7 int 10 stam 9 haste with 4 int 1 crit enchant (11 int)
heirloom legs 9 int 13 stam 6 haste 6 crit with 5 int 3 crit enchant (14 int)