You MIGHT be able to find Silver Chitin Hand Wraps in the bazaar for under 3.5k...or the stonebrunt item (I believe it's called Swift Claw Sash).
Other than that, if you have LDoN, there are haste augmentations that can help too.
And remember, you only need 1 haste item... the haste effects on different items will not stack with each other. (Though they will stack with spell/song haste)