A while back I looked and looked all over the web for a wire cover that goes on the steering column and covers the exit point of the horn and turn signal wires and I could not find one.
I was lucky enough to have someone check some old trucks in Kansas City area and find one for me.
But I just the other day see that you can get some from Corvette Central and they look like the same part as what I needed. A few of the Corvette parts end up being the same (like for the engine and stuff).
Any ways here is the part at their site: Steering Column Wire Cover New
and the detail: cover item description
and the location on the column: on column picture
except it looks to be rotated about 90 degrees in that picture.