swim briefs in large sizes

[little_weasel]

I have a friend I've been meaning to buy a pair of swim briefs for (he agreed to send me pictures if I did, hehe). Ideally it'd be a low-rise cut like these. But when I asked him for his hip measurement, he said 46.5 inches - he's a big-boned guy. That seems to be off the top of the sizing chart for most swim briefs, all the more for styles we actually like. Does anyone know of a place where briefs to that specification are available?