833 Gear Pitting... Help!

It's looking like I'll Rebuild! Need Help Finding a 3-4 Shift Ring and a Reverse Gear as they are badly Pitted.
The Input Shaft is Also Shot, but Brother 66fs is gonna help me out with that.
Next Stop. Brewers for the Bearings and Seals!
I bought the Book from Passon's on Amazon for $20 bucks.
Here's a Pic of my Shift Ring, Reverse gear and the tip of my shaft (for anyone that wants to see) Lol

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