Car bases

Hi,I've had a Roma Vita travel system and there is no car base with it so looking to buy one separate,the trouble is I'm struggling to find the right one so I wondered if anyone could point me in the right direction please??the only one I can find is the one that holds the Roma Bambino and wondered if my car seat would fit that??I will post some pics to show you which pram I've got.Thank you in advance