Jalopy with a car seat

I was wondering if it were too impossible to ask someone to modify the Jalopy from Episode 2 to have a car seat.

Not only is it a car seat, but if you shove the gnome in it, it will “snap” in place so it’s easier to carry it to the rocket. I just hate zapping it in front of me every now and then because it sometimes glitches, gets stuck, falls through the map, or I can never find him.