Pretty much any bobcat door with the flat glass will fit your machine from about 1990 through the 2000 F models. All 553, 751 753 763 7753 773 853 863 873 in those years will work. Maybe even a few years older, not sure though.
They started the G models in 99 and these have a door with curved glass that won't fit yours. These machine have triangle shapped head lights instead of the traditional retangular lights.
Ken