Amana Tool 49206 Carbide Tipped Roman Ogee 1/4 R x 1-3/8 D x 11/16 CH x 1/2 Inch SHK w/ Lower Ball Bearing Router Bit

The Roman ogee bit, which has a convex curve coming off the bearing, produces the reverse of the ogee (it isn't an upside-down ogee). The curve starts at the top as a concave, and fairs down into a convex curve. Use a handheld or table-mounted router.