They most likely carry it in the team store @ the Oracle.  Possibly the biggest Warriors store around.  I'd mos' def. check there if you live around Oakland or if you ever go to the games.

is the team store at oracle?
Stupid question, I know. :)

It's actually on the right side.  The left store on the left side is actually a stand.  The team store is where they got that display of merchandise up (Jerseys, Jackets, etc) behind a glass window.  The entrance should be next to the window, and then walk down the stairs to the store, but be prepared to show them your ticket on game night, as they require you to do so(probably security reason).  The Team Store is pretty big, probably can find most of the stuff you're looking for there, besides the correct sizes if they're out of stock.

Thank you! I'll make sure to go in the main entrance!