Sorry, I've been really busy and sort of forgot about the thread.
I was not able to find replacement parts anywhere, and I tried all the great ideas that were suggested here. I was able to get the blower welded back together and so far its worked great. As soon as I had the blower fixed up and ready to go it basically stopped snowing. Some would say that means it is working perfectly

Actually, I've used the blower quite a bit mostly on the older snow pack. After the welding I replaced all the grade 5 shear pins with grade 2's and bought a box of them. I've replaced many, many pins but the welds are holding strong (knock on wood) and I'm not going back to grade 5.
At times I wish I had a few more hp 16 HP when cutting through 2+ feet of hard snow pack but as long as I go slow it will go through anything. I had drifts higher then the ROPS If I backed in about 4' pulled out and backed in again, and again (and again sometimes) the blower would eat through anything. It was pretty cool to open up and widen driveways after my neighbors with their L series and larger gave up.
I've got a few improvements I'd like to make over the summer if time allows (like a poor mans cab). But overall I'm very pleased with the performance. The rear blade and bucket have their place but for deep heavy snow a blower is the only way to go.
855idiot thanks for reminding me to post back and thank everyone for their reply's I really do appreciate all the good input.
855Idiot said:
So...
It's been a month,
Update us!
Is the blower welded/repaired/back up and running.
Inquiring minds want to know.