Fitted a electric to the front of the radiator thinking it would help the clutch fan then doing low speed 4wding, seems it was a waste of time it feels like it hinders the airflow when idling in the carport so I don't think it's going to help.
It's aprox 2mm thick as I've been looking at it my self but they do do a fire wall sheet which is 10mm thick that I've worked out to be about the same price per m2.
So last weekend After having a wheel alignment and balance I've retightened the wheel bearing with a torque wrench to spec and 90% of the vibration has gone so I'm happy with that for now till the finances allow more expense.