Thank you Chops, Rod and Lotz-A for the help.
Are the aluminium ones you refer to the e-bay special ones?
I'm not going to be doing hard off road work on this Land Rover - It'll be more of a Sunday Driver, with the potential to cruise around the farm if it's good conditions. Given this - is there a relatively cheaper option you'd recommend? or it it worth getting the original re-cored?

