Finally received the double-wall boxes I ordered yesterday, but too late to get it packed up and shipped. Did that first thing this morning. I cut the styrofoam to fit and layered it in the box to give a nice, solid holder all the way around the 'charger:
Cutting it was messy but made a lot easier using my weapon of choice:
It is due to arrive at the rebuilder's on Monday, I'm hoping they don't have too much of a backlog and will be able to tear into it right away.