Hello, I was wondering where I can find a car seat for my 3 year old boy, he is 54lbs, so very heavy for his age. I can't find a car seat which has a high enough weight limit for him anywhere. Also, as you can probably imagine, he is very fat in comparison to other 3 yr olds meaning that some seats and harnesses can be a bit too small for him. If anybody knows of a car seat that I could use I'd be very pleased to hear about it :)