I'm pleased to announce that after almost two years of looking, I just bought one on eBay.
Untested, but appears to be in immaculate condition, and, although I'm not sure, it looks like it might have the original USA-made GE F8T5/CW lamps! All in all I'll have paid $26.50 to get it, which isn't bad for a slightly rare lantern, and with two (hopefully) vintage lamps to boot! I've seen these go for upwards of $50. They apparently have some sort of following because every one I've ever seen on eBay sold immediately, sometimes with bidding wars. As it is I outbid someone else to get this one.
I'll get to see it when I arrive home for the summer on April 29.
Take a look!