You could definitely do this to get the surface shape. Would have to add some sort of sealer and mold release for the fiberglass and some sort of retention setup. You would probably have to thicken the fiberglass to make sure it was as stiff as the original and offset the mounting tabs to account for it but its all doable if you want to take the time. Best of luck!Thanks for the replies, fellas.. I'm not looking to put gauges in mine, just keep it stock.
I wonder if I got a hold of one and made a plaster cast mould of it, could one be made using fibreglass... Thoughts??