1) He didn't mention any metal, only a failed variocam pad. No need to make assumptions.
2) Yes, it does. $1,849 plus tax and shipping. If you want any warranty coverage, you'll need installation from a certified installer which will bump that to $4k-$5k.
3) Plain bearings have their own modes of catastrophic failure. Take it from an engineer.
As I said, the best course is for the OP to do the research and select the one he's most comfortable with. That's always the best advice.