We've got a Bebe Confort Creatis car seat (The rear facing one, from newborn, clicks on to the Loola frame) which we used for ds. I've just washed all the lining material in preparation for dc2, and I can't find the newborn insert thingy that goes under their bum. Is it really necessary? Does anyone know how I can get a replacement one (the car seat is 2 years old) please?