Fleck 9000, 9100, and 9500 all use the same Back Plate for the power head.
This is just the bare plate ( pn 15131 ) , you'll have to transfer all the parts to it.
NOTE: You will want to order the LABEL ( 15175 )
listed as a Related Product for ordering.
And you should be able to re-use your screws ( PN 18728 and 19367 ).