Just get plain old powdered creatine monohydrate. Here is a
link for some for a good price.
Some people say that you have to load the creatine for a few days to fully saturate your muscles. I've seen recommendations for taking 5g up to 4 times a day for the "loading" phase. But others believe that you don't need to load it. Personally I don't and never have. I take one 5g serving each day. And it doesn't really matter when or what time during the day you take it, just as long as you take it.