I don't know about a library in your area but I would suggest ordering the "Java 2 Certification study guide" written by Simon Roberts, Philip Heller and Michael Earnest. You can find it on this site or amazon.
I took the exam on 11/20/00. Unfortunately, I only scored a 59% with 35 correct answers but I did not see any Grid Bag questions. I guess it is just the luck of the draw.
