We only sell the Magnavox model at the location I'm employed at. We sell it for about $49 and, interesting enough, the Funai name appears on the manual for customer service.
There are some Magnavox items that are still made by Philips, but a lot of the cheaper Magnavox branded stuff comes from Funai now. I'm not surprised the converter box is that way.
I can almost tell if an item is made by Funai by the shape of the remote, regardless of the brand. I have a Symphonic TV/VCR combination, a small Magnavox DVD player, and an Emerson DVD recorder/VCR combo with similar remotes that work on each other's items for the same functions.
I've tried to get to their website, but it apparently isn't up at the present time, but here is the article on them in Wikipedia: http://en.wikipedia.org/wiki/Funai