All 4 boosters listed in my 07 owners book are no longer for sale. Dealer tells me 09 book claims all NHTSA approved boosters will fit. Called VW customer service and they will not discuss car seats and told me to call NHTSA (nice). NHTSA was no help at all. My Graco backless booster seat sits on top of the rear seats and wobbles. Kids cannot be safe in this. Any ideas about a narrow booster? Probably needs to be backless as my 7 and 5 year olds need all the leg room they can get. Thanks much.