I found some doors I may be able to purchase at a good price. One is missing glass. They are manual doors. The doors I have currently are electric (not what I prefer). The question is, would the glass from my current electric door work in the manual doors or will I need new glass? I'm not sure exactly what year the manual doors are (the guy selling them was going to put them on an 86) My electric doors are from a 79. If I have to replace it, any idea how much glass costs?