Where is the best place to locate information on safety ratings for convertible car seats?

I would like to be ready for the next size up car seat for my son, who is almost 8 months old and will soon outgrow his infant car seat. He still fits into it per the weight and height restrictions, but he just looks uncomfortable in it, like his legs are scrunched up since he's still rear-facing. I would like to find a bigger car seat that will accommodate him for a few years beyond 1 yo.|||I would contact your local highway patrol and see when the next car seat safety inspection is. Also google convertible car seats and read reviews on all of the ones in your price range. You could go to babiesru.com and read reviews there as well