We ended up buying the tiger ones through eBay. They arrived yesterday and seem very good quality (in terms of build--nothing special in terms of fidelity). They're a little heavy, so they'll add to the weight of our carry-on bag-of-stuff-to-keep-babymicah-entertained, but far more importantly, he seemed cool with wearing them this morning to watch a couple Elmo videos on the computer.

I'll report back about how he does with them on the plane when we get back from our trip.