Inverted cove bit

Does anyone know where I could buy an inverted cove bit with a quarter inch radius and no bearing guide on the fat end. It would be okay if there was a bearing guide on the shank end. I need to cut the following profile see picture. The profile on the top has a quarter inch radius. Profile on the bottom as an eighth of an inch on the roundover part. If there isn't such a router bits anyone have a recommendation for a hand tool I could use. This is part of reconstructing an old door.