It is basically a very flat ogee. I somehow doubt that you'll find it based on name alone given that many manufacturers don't seem to know what the correct names for things are. This is a near match, albeit in MDF - the manufacturers call it a lamb's tongue, but I was taught that a lamb's tongue is like this:
The term actually originates from sash glazing bead shapes - any lamb with a tongue shaped like your moulding would be deformed!