Darn, I wish I read this post earlier. I just went through the exact same thing a few months ago with my makita. I bought a new snap on drill and found out i could get the ring around the clutch of my makita. I think I spent 12 dollars total. I ordered the bolt in the center and the ring through my local tool truck. I drilled out the bolt head and it came out real easy after the bit got into it. If I remember it is reverse thread and I used a normal direction bit. I fixed it up and now have a great spare.
