I got the one I used in lots of videos from a jiffy lube. I had to call about four lube shops until I found one. And it still had grease in it that they didn't want anymore - so I gave the grease to free cycles.
In fact, I gave all of my RMH stuff to freecycles. I heard they weren't using it. If they aren't gonna actually use it, they might be willing to let you have it.