I saw this a while back but never got around to posting about it. I was reminded about it today. It's a more or less off the shelf independent trailing arm suspension for trailers that's being made now in Austrailia. It may be of more interest to manufacturers than individuals, since I don't think they sell direct. But it certainly looks like a nicely engineered off the shelf solution for anyone who's in the off road trailer business. No idea about cost or importing. But it's worth noting that AL-KO just merged with Dexter, so I guess there's some possibility of these being incorporated into their line.