Yoaks5

Mine have 1 screw that holds the camera on. That Allen screw is covered by a cap that just pops out. Some of my caps have a slot in them and these have threads and screw out. You can download the manuals for these at velvac website. They have several documents that show how to that these apart. My mirrors are 2030 model. I would think yours would be the same. 

I have the same front end on mine. This is a parts list I found on IRV2 when I was converting my hubs to oil bath from grease. Sorry I don't remember who put it together or I would give them credit. My brakes are Bendix (dana-spicer) ESD-225. I'm surprised your brakes are that bad. My rotors had some cracks in them but were all with in the allowable spec. My brake pads looked like new (85,000 miles on coach).