Where to buy stock mirrors, I ask this because evidently there are cheap replicas. My new to me truck has some really junk mirrors. They vibrate to beat hell and just seem thin compared to my other 1 ton. Thanks 

 

Get used ones from the bone yards.  1500 and 2500 will fit.

Flip out towing mirrors are out there too.

I used 1AAuto but I got upgraded ones. Power, heat, blinker.. All in the regular towing mirror package.

 

After having a 5th gen though, I highly recommend getting that style mirror if you tow often. The convex mirror allows you to see so much to the sides when in tow mode.