hmmm... metal.... i might try to fabricate one out of aluminum in school and see how thats goes... and if i make a set im mostly likely gunna sell them... and if so i can paint them any color for only paint cost.. lets see what i can do

 

now that i think about it... shoot me some ideas to make it attach to window i was thinking double sided tape for the most part and extending some metal into the door jam and possibly use some kind of screw or just have it welded to it... idk let me know