Rover P6 Club

If anyone can help with these parts I would be very appreciative, we are coming to a standstill in the rebuild of my TC2000 as these parts are missing from the engine, and we have been unsuccessful in finding a complete donor engine in Malaysia. I am urgently looking for these used parts:

camshaft sprocket, timing chain tensioner spring, set valves, valvecaps, collets etc., set springs, camshaft mounting bracket assembly & studs.

Thanks and regards

Andy