I went to Kartek over the weekend...talk about a dangerous place to take a credit card! Anyway I went looking for window nets and they told me I need to bring in a cardboard template of my windows and mark where I want the eyes for mounting them. I live kinda far from kartek so it's a little bit of a incovenience to drive way up there again. Is this the only way to get window nets for our truck? Are there pre-made sets out there somewhere? It's for an F150 (race application if that makes any difference). The window opening is 21.5" long and 22" tall.