In the end, it probably took 3-4 weeks to get my money back for a $5k 1-day delivery package that wasn't ever delivered. I would have gone the bank route next, but since Amazon did eventually give me my money back, it wasn't needed.

I'm sure the shipper was who lost/stole the package. But my point is that you can't take your great support experience with Amazon buying $50 sheets and expect that you get the same experience when they lose something expensive. For expensive or specialist items, you can often get the item faster and cheaper going to a different retailer despite how all your experience buying cheap stuff on Amazon tells you otherwise.