look for these
We just installed them on two trucks last weekend three bolts each simple install. 200 bucks a set from eBay - Towing Manual Side View Mirrors Left & Right Pair Set for 88-98 Chevy GMC Truck
I got a new set of Firestone ride right airbags and they are awesome. I am frequently loading the truck to the maximum for camping and towing a trailer, do not hesitate get them for sure