Gnome Twist Cloth from Races of Stone - +1 armor bonus, with no max. dex. If you take Exotic Armor Proficiency (Gnome twist cloth) the armor bonus (including enhancement bonus) applies to touch AC.
Thistledown padded armor from Races of the Wild has a max dex of +10.
Magic of Faerun has the Nimbleness enhancement, which increases the max. dexterity of armor by 2.