Not sure on how soon you're looking for this, because the below link is out of the stock from the US store, but this is a crazy good deal on these things, and several of the guys I run with use them, and they work great, just buy yourself a different tip.
It's in stock in the international warehouse, but then it might be a few weeks for shipping, just depends.
http://www.hobbyking.com/hobbyking/s...arehouse_.html