There is some clothes at DAZ, but they are for the Millenium Teens.

BillyT has some hip-hop clothes for V3, that might fit to skateboard style.
Don't remember who did it, but there are some "roller skating" clothes at PoserPros (?) for V3.

But i can't rememeber if i have seen any clothes for M3 that would fit your requierement. Oh yes, perhaps at PoserWorld.