Sun Visor Material: I think must builders installing visors use plastic from clip on visor extensions which is usually only about 4” wide. You really need a visor that is around 7 or 8 inches wide, because in late evening or at sun set you will need a visor that covers more of the lower section of the windshield. I found a locost supplier “Pop Display” in South Bend IN 46614; that fits the bill for material that is excellent for a see-thru type visor. Green Acrylic Plexiglas sheet that is 1/8” x 48” x 7 7/8”. Their part No. 2092 for $14.50 plus shipping. They will also cut it in half for shipping at no cost. Their phone number is 574-233-1934 or you can contact them at
http://www.go2pop.com . The Plexiglas comes covered with paper on both side which helps prevent scratches while fabricating the visors. Dave W