NHTSA Complaint #11477357 — 2015 CHEVROLET COLORADO

While driving on the highway, my vehicle show battery light and then hi temp due to a loose belt, after stopping on the shoulder of the highway, I inspected the engine compartment and found out that the air condition compressor bracket broke, I tow the vehicle back home and try to repair the broken part but I found out that Chevrolet has discontinue this part, no Chevrolet dealer, no third party and/or any auto part sales the broken part. I called Chevrolet and they told me to call dealer but I had no luck. My 2015 Colorado truck is parked on my driveway for the last 2 months. Chevrolet dealer can't help me since they say that Chevrolet discontinue the part. So, what can I do? how Chevrolet can help me with this query?