Turn Signal Replacement

[Googenheimer]

Over the weekend my turn signal broke inside the column. The actual lever is still intact, instead it was a little piece of plastic that broke and fell out of the column. I'm not sure what it was. Now the lever moves up and down quite freely and if I try to signal to the left or right it doesn't turn on the signal, but instead honks the horn!! Anyone had this happen before and where would be the best place to find a replacement?