Thanks for the replies.

Mr K, it will mainly be used for collecting firewood from the woods at the rear of my friend's house. He has access to lots of free wood but only if he collects it. The woods are steep and the ground conditions are not great, especially in winter. A pick-up will not fit down the path. A quad bike will, but would need a trailer.

We do have the contingency of just welding up the front diff but that would be a shame if we can find a way to fix it instead. We have no plans for a full-on, gleaming restoration (although you never know - we might fall in love with it!). It's a miracle we have managed to get it running at all given the number of wires that are just hanging out, not connected to anything! Also, the front diff was completely mashed inside so we are trying not to think about what the rear diff might look like...

As far as we can tell, "Wu's" company no longer exists. That web page is dated 1997 and there is no email details on it.

The farm restoration idea is a good one. Neither of us really know how to describe the vehicle so finding the right forum is a bit of trial and error.  We are chasing up local UTV workshops and stuff but we have yet to find anyone that has seen one before. Someone must know loads about them but we have yet to find that person.