For the sunvisor part of the problem, my Marathon had the Prevost original pull down type.
I did not like them because it took two hands to retract them, and you could not reach the one in on the passenger side. And because they were mouted squarely in front of the windshields, there was a small gap near the center of the windshield where the sun would sometimes hit me right in the eye.
I took them off, and have them in a box ready to ship to someone who makes me an offer I can not refuse. Includes both front shades and the drivers shade with hardware. All you need are a few screws.
I have no computer till Sunday night but you can email me at pvans@pacifier.com or give me a call at 360-901-7611.