they installed an axleshaft kit on xtreme 4x4 a few weeks back that was pretty cool. had new shafts and a c-clip eliminator that turned the axle into a semi-floater. looked pretty sweet, dont recall how much it was though.
if it were me, i'd go grab a set of stockers and see how they held up for me before i went and spent $300 on chrome moly's. you're only running 33's. you can always upgrade later.