That's a nice van. We spend August bank holiday most years down at West Bay with Bournemouth & Poole dive club and some of the members there have beautiful vans, all in the 80k+ new though. Not what I'd like to be driving down a narrow road in Western Ireland or Cornwall.
Perfect for them...
We got our van from Sussex Campervans up near Horsham. They build vans to order. I'm not suggesting going there specifically, but there are quite a few companies that re happy to talk you through the options and process.
https://www.sussexcampervans.com/our-vans
Technology is also moving...
We currently have a campervan based upon a Vauxhall Vivaro LBW, and as a kid I travelled in many different configurations.
Our van had a 'pop top' with space for 2 to sleep in the roof, and a rock and roll bed below.
Generally vans of this style have:
kitchenette along 1 side, with 2 gas...