Sure. Wheel and Sprocket has been on eBay for a long time with a good history.
I have the same fork on my WW 062 singlespeed. I'm very happy with it. I didn't think I would use the lock out much but I actually use it quite a bit. It's much better than any of the cable actuated ones that I have used. Amazon.com will have some good deals on them occasionally. I got mine as an Amazon Warehouse deal for $250ish.