Cost to replace cruise control arm & switch assembly

What is your question?

I would like to replace turn signal, cruise control and windshield wiper control arm along with the switch assembly and harness in the column for a 1999 Camaro. Cruise control turns off with turn signal activation, left turn does not turn off, high beams do not engage. What is the estimated cost of this repair and what are the part numbers.

How long has your 1999 Chevrolet Camaro had this problem?

Months