Need help with a Troy Bilt sickle mower 34062

I have a Troy Bilt sickle mower I inherited from my dad. Last summer while I was using it, the belt flew off. Upon looking,I found the problem was the housing that the pulley mounts on broke all the ears off. I took it to a welder friend and he tried to fix it,but the thing didn't turn out too well. I tried a new belt,but apparently the housing piece isn't lined up or there are other issues. I just decided that I would rather get a new housing piece,but ever time I locate one,they are unavailable. I called Troy Bilt and they haven't been able to help either. Sears has a listing of most parts on PDF (Housing assembly
PART NUMBER: 1766658001) but it comes up unavailable. I am trying to get it back together by spring and think I may have to locate one used. Anyone know where I could look or try to locate parts? I have been internet searching and calling for 4 days now and I an at my wits end.
Here is the PDF page item 73..
http://www.searspartsdirect.com/par...7/1500600/10041334/00002?blt=06&prst=&shdMod=