My CA geography is week, but IIRC, you're in the LA area - call around to LFS and see if they have any hitchhikers. Some places will give them to you, or ask a $1. One of my LFSs is asking $30...
You can find them on eBay sometimes, stomatopod.com is gearing up to sell them again after their move, and if you want an N. wennerae, TBSaltwater.com will ship you one for $50.