Infant carrier question

Keo

My first baby was a boy and then we had two girls. We bought a new carrier with our 3rd baby and got rid of the first one and it is black with pink polka dots. We are expecting another boy, I don’t care all that much if he has a car seat with pink polka dots but does anyone know of any companies that make replaceable inserts for infant carriers? I’ve seen a few on Etsy and eBay but there’s nothing about safety. Anyone have experience with buying something like this? Our car seat is a Safety First.