Looks like I have a bunch if throne reading to do on gears.If you know all the specs (pitch/module, pressure angle, width, bore, etc.) you could have them 3D printed in plastic.
Apparently some lathes now come with (at least one) feed gear in plastic as a "fuse" in case of crash.
They are reportedly quieter too.
Brian
Smithy shows a set on the website , little pricy .Have you checked with Smithy about those? I'd ask them first