Here's what we wound up getting:
http://www.ebay.com/itm/111683199832
Hopefully they fit our eggs!
I was contemplating ordering something like this direct from China via Alibaba, but minimum order would have been 1000. I still might get that quantity, and then sell off some of the stock...
Those are 2x2s for the frame, actually. The Ikea bed happened to have sizes that worked, so the only part I had to slice up were the corner braces (they helped IMMENSELY). The frame took maybe an hour to put together with screws and a nailgun. It goes fast when you don't have to measure the...