Just after anyone in the same situation before we go ahead and buy!
We've done the research, and it looks like the only car seats that work with a lap belt and a 3 point belt are from 9 months +. But we can't wait 9 months for a car trip...
We found that the Graco base works with a lap belt, so this could be our only answer, but every time we look at a video it only shows the 3 point system.
Anyone successfully have a newborn in the middle seat with a lap belt?
Thanks! 