rs1216,
If you visit your family, why dont you ask them to buy it or you?
There is 3 types of car seat in general and it depends on how big your child is. All car seats are not cheap and you can easily to get it from SEARS, Walmart, Zellers.
Or if you dont mind, second hand, go for CRAIGSLIST
rs1216,
I never try before and I suggest you to have your family to do it for you. If they have car, they must know where to get you a car seat and since you are not familiar with the rules, I suggest you not to get it without anyone help.