I think the trailer crossing the Rhine is one captured from the German army or even a civilian one.
As these are so rare, one would have many degrees of freedom building a replica.
You may want to consider building your own trailer like the Canadian 1st Division did in Italy. I’ll look op the thread on here later, but basically they turned the back halves of GS trucks in trailers or built their own on any chassis they could lay their hands on.
