I installed OEM style 3/4 ton tow mirrors on my Sierra. They aren't removable, but telescope in and out. They replace the factory (small) mirrors that came on my truck. The branding is identical to the mirrors on the new 3/4 tons on the dealers lot. They also have heat, turn signals and are adjustable from my door controls. This is the only way I would go after owning these and aftermarket "clip-on" mirrors.
I purchased them on a website called Fenderworld.com They came out of Michigan and ran somewhere around $300. Installation was really easy as well. I popped off the trim piece in the door panel behind my mirror, loosened 2 nuts to remove my factory mirror and bolted these in place of them. The wiring harness plugs into the factory connector as well. Installed they are the same as the OEM tow mirrors. When not towing, I just retract the telescoping arms in. They have the large flat mirror on top with the convex mirror at the bottom. I think they look great and they work well.