Ok, so first, two great resources are the following:
Ernir's List of Necessary Magic Items, if you do not have most of the stuff on this list, you should. Nuff said. Oh, and you can afford all the cool stuff.
Bunkos Bargain Basement , awesome items, for every magic slot. Fill in the blanks after you visit the above list.
Robe of Ebonsilk from Complete Divine, costs a mere 134k, which is a pittance for you, and covers several key area's especially since most Epic characters tend to exceed the Max Dex limit of most armors.
Starmantle cloak from Book of Exalted Deeds, is stupidly broken. But for 132k is a deal.
Laeral's Robes, similar to the Robe of Ebonsilk, and only 160k. Found in City of Splendors: Waterdeep.
Collar of Virulent Poison from Book of Exalted Deeds, if natural attacks are your thing, this is a good option, a steal at only 138k.
Amulet of Alcedor from City of Splendors: Waterdeep, for funsies, only 318.5k.
Dyrrs Impervious vestment, if you don't like Robe of ebonsilk, and need to eek out just a bit more AC, then this robe at 123k is a steal. From Complete Arcane.
Ring of Adamantine Touch for 120k, from Book of Exalted Deeds (seeing a pattern here?), again, for natural attacks.
Belt of Battle is almost required at this level. (a Battle Belt of Magnificence +6 & healing only costs 212750)
Retributive Amulet (Book of Exalted Deeds, p. 116) halves damage, other half sent back to attacker costs 56k
True seeing (ALA Hathran mask of true seeing)
Freedom of movement (Multiple different methods)
Evasion & Mettle
Mindblank (third eye conceal)
Translocating Boots of speedy Striding and Springing
Mantle of Great Stealth
Boots of Swiftness
Flying of some sort, (see above)
Minor cloak of Displacement (is better than major version)
Continuous Collar of Umbral Metamorphosis