Rubery-Owen trailer
 

Wanted Rubery-Owen 4 wheel draw bar trailer. Please pm me if you can help.
Edward Brown

Axles
 

I think if you look at my post, called "Living Van Running Gear Suitability" in the technical topics "single speed" has posted that his has a set of axles for a Rubery Owen trailer. Perhaps not a complete trailer, but may be of use/interest. He posted 30th June if memory serves correctly
David

Still available if you're interested