Third party warranty? No way. I did pay the difference on my '09 Ram to upgrade the factory 7/70 with lifetime power train to be lifetime bumper to bumper. Haven't really needed it yet so can't comment on anything else about it.
Lifetime bumper-to-bumper???? Wow. What did this cost you? And what is considered "lifetime"? Is it seriously as long as you own it, they'll replace any little switch, bulb or gizmo that stops working correctly? I've never heard of that.