Would anyone know where a person can find the clear windows that zip into the sides and back of a what I call a bimini cover (it snaps to the windsheild in the front). I have a 1989 SmokerCraft 18' Challanger, and the cover is made by "Taylor Made". But I can not find anyplace even the manufactor that you can purchase these windows. The cover Part # is 660 861403 105 / 86 Sly 18 Spt SS Sptm. The cover was purchased last year, can't remember from were.