what should I buy?

[COB]

My son is 4 1/2 years old. He is very tall (44 inches) and skinny (40 lbs.). He is too tall for his 5 point harness seat. What would be a good booster seat for him? I know it is pushing it getting a booster this soon, but I can't afford another 5 point system and then a booster down the road!
COB

	Booster Seat A booster seat raises your child up so that the car's lap and shoulder belts fit correctly. The lap belt should fall across the upper thighs. The shoulder belt should go across the middle of the shoulder and chest. A booster seat is used for older children up to about 80 pounds. Some states have passed laws requiring booster seats for children up to age 8 or 80 pounds. Check your state's law.