Aveling GND Diff Inner bevel Wheel

[The governor]

Hi guy's wondering if anyone has any patterns for an aveling GND tractor (1914)bevel wheel gears and possibly the pinions as well for the diff that we could borrow.
We have found a crack in our inner bevel wheel its been repaired in the past but certainly its days are over now, The crack goes right through the web of the spider and is not worth repairing. just looking at the options open to us......cast is one, complete new set cut another or if anyone has a random spare or can point us in a direction it would be very much appreciated All comments and help welcome


Kind Regards Rob