I think Deejay has some knowledge of the use of aluminium gears, Gadge, and IIRC he said they became unavailable years ago. Given that the fairly awful aftermarket steel gear became unavailable last year, and we've had several people desperate for a gear of any kind since, there probably isn't much chance of them all having missed an NOS aluminium one out there somewhere. There will be used aluminium ones still in service though.
