First of all, raising a torkoal for speed? It really won't help that much. Anyway, I recommend meteor Falls, up the waterfall. There are many golbat, and they give two points toward speed.
Follow the link that was given to you. I'm printing it right now as it's really helpful. Actually, most of the pokemon listed I figured would give those kinds of EV points anyway, but it's always good to have a reference. ^^
If you have any more EV-related questions, please ask them in the EVs/IVs FAQ sticky. The sticky also has a list of where you can train for different EVs.