Scorpion FV101 Combat Vehicle Reconnaissance (Tracked) in British service 1972-2020 The CVRT (Combat Vehicle Reconnaissance Tracked) family of reconnaissance vehicles has been highly successful since its introduction by the British Army in 1972 and it has seen extensive combat from the Falklands...
haynes.com
Heh. It's not actually useful, just a funny coffee table book.
https://hmvf.co.uk is good for CVR(T) specific questions.
I've long wished for a repository for British manuals, but it's not something I've found.
I do have many manuals for CVR(T), PM me and we can get you copies of what I've got.
https://marcusglenn.com has print copies for sale but they are expensive, and if you think the manuals are expensive, the shipping they charge to the US is nothing short of breathtaking. They also don't want to ship parts without a lot of paperwork.
You aren't looking for "TM"s, the Brits have CES (complete equipment schedules), IPC (Illustrated parts catalogue) , and AESPs
Your buddy is late to the party in buying. A large proportion of the remaining CVR(T) have been shipped to Ukraine to support the efforts there, as a result they have gotten a *lot* thinner on the ground. Neil still had a pile of them out in Illinois though as of a couple months back.