I agree, I've had the pry bar in there myself but as you say.. With the car jacked up everything is at different angles to how it is when driving. My Bora had a similar issue and did turn out to be the Airlift "top mounts" and Airlift sent be replacement parts which cured the problem. Back then I could grab the strut when jacked up and shake it to recreate the noise. New "donuts" we're put on when I fitted these struts and I can't wobble the actual strut this time.
150k on this old beast ! Replied to your PM btw