I am having a tough time spending ALOT of money on about $25 of wood for the top kit on my 5 window. Does anyone make a steel header and top kit? I know they all vary some but geez..... I also will need the quarter window wood kit for $80 each!!!! OWCH!!!! About $600 in kits for some firewood? Is there a better reason to stay away from metal other than its easy to trim to fit and tack interior to?