I would say the hub the bevel gear mounts onto will need replacing as well. Probably a good time to change the bearings. From what I can see of the bevel gear it appears to be fine but it will need to be set up again on reassembly.
Without knowing where you are from I can only suggest you try Florin Tractor (USA) or any machine wreckers in your area.
I'm in Arkansas. Just for my clarification,is this is the same chassis as a d4 and if so what model d4 and will the shaft interchange? I'm able to turn the bevel gear by hand and I'm sure that's not a good thing! The only good thing I've seen so far, is I feel better in my welding abilities in comparison to what I found. Man is that ugly! Thanks for your response!
Plug in your part numbers to www.machinerytrader.com. They show used 8H5546 shaft and also have hub 4A0352
Nothing to do with the D4
You will also need
Key 0T0024
Nut 0T0231
Also there most likely will be a set pressure that the hub needs to be pressed onto the shaft likewise for the inner clutch drum assembly.