There are a couple different makers of the conversion van windows. Ideally you want the same one as you have taken out as they do vary in shape and size a bit. So making sure the replacement is the same is important. Many measurements must be taken, can't just go by pictures or general shape.<br><br>The interior panels must be removed to remove the dozens of bolts/screws that pull the window tight to the exterior via an internal frame.<br><br>The screens are mounted in the window frames just like in homes. No special screen need be acquired.<br><br>I backed my screens with chickenwire to make it more difficult for thieves to bust in, or my feet to rip the screens from inside.<br><br>I broke my sliding window. I replaced it with some smoked acrylic I got from Amazon. I left off the stock locking mechanism, but the window slides open and closed as originally designed.<br><br> Lexan is polycarbonate. Plexiglass is acrylic. Lexan is more impact resistant, but scratches easier. Acrylic is still stronger than glass and is more scratch resistant and UV resistant than polycarbonite.<br><br>Fixing this window will not be easy for the non handy types. Just ripping out the interior enough for a full window replacement could frustrate most, and a repair shop will be rubbing their greedy paws together with dollar signs in their eyes. Inserting new glass or acrylic or lexan into the non moving portion of the lower window and getting it to reseal would be a big challenge. Glass shops would legally need to use ANSI approved tempered glass. The sliding window is much easier to replace, but still takes some skills. <br><br>If you don't care about appearance or functionality of the sliding window, then you can glue some Smoked acrylic or lexan to the outside of the window, or can just do this as a temporary fix until you find a junkyard van with the same exact window to replace yours.<br><br>If you go this route, buy new foam weatherstripping for between the window frame and van body. Do not rely on caulk alone or you will be pulling the window again to clean the caulk off and then using the weatherstripping. The different expansion and contraction rates of the aluminum window frame and steel body will compromise caulk, as will as body flex.<br><br>Good luck.<br><br>