Car Seat Help Please

Hello mamas hope everyone had a wonderful Christmas and happy new year!!

I am in the market for a convertible car seat that has multiple bases like the infant carrier car seat. We have 4 different cars my son often travels in. Does anyone have any suggestions. I’m thinking there aren’t many options as I’ve been doing a lot of research and not finding much wanted to see what you guys did or if anyone knows of a good car seat like I’m looking for. Thanks really appreciate any and all suggestions