Mine came from Dales who are in Redruth Cornwall. They were really fantastic to deal with.
I also went to my local Renault Dealer, who to my surprise were also able to source another unregistered pre facelift vehicle but could not match the price even after I added back the delivery cost (630miles on a transporter!!). It would be worth asking your nearest dealer, as I am sure they all have access to a national stock list, so if there are any still out there they should show up.
I would hazard a guess that the melamine is applied over the ply lining (otherwise wouldn't it sound like a wobble board all day long?). It would not be expensive to retro fit in any case.
One of the biggest surprises to me is that nobody notices that it is electric. I guess they just see a familiar white van and it doesn't occur to them that it is not making any noise or spewing fumes. Personally I love the anonymity, but maybe not the PR
shouting impact others might want.
Your mileage requirement looks ideal. I do not know how Renault think they can use 106 miles in their official literature and then not expect potential customers to walk when they tell them the real range is optimally (for which read 'at best') 70 miles. I think it must be very damaging to sales. I see that La Poste who are the Kangoo's biggest customer appear to work on 70 kilometers in terms of the applicable mail route distance. I challenged my postie to do his round in a ZE, but it turns out his round is 72 miles, which would be a challenge indeed.
GrumpyCabbie asked what I used the Kangoo for. The short answer is everything!! Tractor wheel to the repair shop, collecting animal feed, transporting the dogs, pallets, furniture delivery, ironically taking fuel cans to the garage for the small tools, and everything domestic from shopping to the recycling run. The biggest problem is availability because the other half nicks it all the time!!!
Good luck with the search!!