520-H upper steering shaft worn teeth

[chucksterock 15]

I picked a compete gear reduction steering setup to put under my '88 520 which has the 2 stage snow blower on it.  All of the pieces look good as far as wear on the teeth except for the gear on the end of the upper steering shaft.  The smallest gear shows the worst wear as you'd expect.  The teeth are pointy indicating a lot of wear to me.  It looks like the shaft is available from Toro for $183, but I was wondering if anyone had found a replacement gear to put on an old shaft?  TIA