I have a trailer made from the rear end of a swb landrover, it uses the original chassis,axle,wheels etc. and it works very well.
If you look at my "introduction" you can see a picture of it hooked up to my landrover.I could email you a few pics of it if you like or you are more than welcome to drop in and have a look.
I'm hoping to turn it into a camper trailer one day