1978 Chevy El Camino turn signals

Electrical problem
1978 Chevy El Camino V8 Two Wheel Drive Automatic

I wrote in awhile back that my cruise, headlight and turn signal switch is still attached by the wire. I am missing the connection between the arm and the trun signal mechanism. I can disassemble the top of the column if needed. Where do I find the piece for the connection? What is it called?
Also I have been advised to replace the entire column. What years makes and models will fit my 1978? The ones that I have seen have a thick large trun signal arm, mine is the slim small end cap push button type. I have been given references to Buick, S-10 and others but only on vague terms.
I really need my high beam and turn signals, I can live without cruise. DAVE