I actually googled the Rover M16 cam lock tool. OEM was way too much. Bought a complete kit like this
https://www.amazon.com/vidaXL-Engine-Universal-Timing-Locking/dp/B078TM4F8Z to cover all avenues. It worked out to be about 20 pounds with free shipping.
I've seen some videos where they make their own (porsche, etc) but for 20, why not be able to do several different engines. We'll see if it works.
