I broke the glass on my JD 5520 cab door last night. I was on a steep incline and had just dug a hole with my phd and wanted to move forward a little. I left the door open and the tractor was hard to stop on such a steep hill and the door barely caught a tree and shattered. I was wondering does anyone have any idea where I might find a good used glass rather than spending the $$$ on a brand new one?