For sale are used flat belt pulleys. They are dirty and rusty and some of the set screws turn hard. Each is sold separately from the "select" drop down menu. 

--15-1/2" Dia., 1-3/4" Wide, 7/8" Shaft, 

--12-3/4" Dia., 2-1/4" Wide, 1-1/8" Shaft, 

--10-3/4" Dia., 3-5/8" Wide, 1-9/16" Shaft, 

--8" Dia., 3" Wide, 1-1/4" Shaft

--5-3/4" Dia, 6" Wide, 1-7/16" Shaft

--11-7/8" Dia, 2" Wide, 7/8" Shaft

If you have any questions just ask.