I've not heard of this place before but some interesting machines.
You're right, the 200 was simply a J4 with a bonnet later known as the LDV Pilot. The 300 became the LDV Convoy. I put a lot of miles on a mk1 Sherpa and loved it.
The Maxus is now back in production in China.
Hi, may be of interest, the seller has two pairs on offer. No connection to me.