Amulet of Natural armor +1 (2000)
Bracers of Armor +1 (1000)
Kama (or other monk weapon) +1 (2000 + weapon price + masterwork)
Ring of protection + 1 (2000)
Ring of Feather Falling (2200)
You could pick up utility potions such as Jump, Levitate, Spider Climb, Fly, Resist Energy.
Plenty of options Of course monks ain't half bad in just their birthday suit, so you could load up on enough alchemist's fire to torch a town.