Cub Cadet 122 parts

I have a Cub Cadet 122 with a mower deck. The right cutterknife spindle assembly is shot (the spindle, the bearings, the key and key slot, the pulley, etc.) Bottom line is, I need to replace the whole thing. I went to my local Cub Cadet dealer and he said that certain parts were hard to come by ( some must be harder then others, because I just bought a front clutch rebuild kit from him right off the shelf). He said he would look for a source. Nothing so far.

My question is, does anyone know of a source for Cub Cadet parts such as what I described? It can be an internet source or a dealer name. I can certainly do this by mail or phone as well.

Thanks in advance.