I understand that kitchen fitters use a laser scanner device to digitise the rooms where for example new worktops and units are to be fitted, and these are very accurate. At a smaller scale, dentists now use handheld laser scanners to take "digital impressions" to make crowns and these are extremely accurate. I doubt the dentist devices would help you but maybe a kitchen fitter with the right equipment could do a scan for you?

Try https://www.craftsmanltd.co.uk/3D-scanning.php

I found that by googling "kitchen laser scanner"