You need to do some looking on your own first. Then others here may be about to help you narrow or deepen your topic. It took me about 30 seconds to find this reference on Roman forums in Italy, outside Rome. I'm sure you could do much better given more time.
http://www.nationmaster.com/encyclopedia/Forum-(Roman)
Thanks, i found those already, the problem wasn't really finding those but rather showing the evolution of the Forum. I'm planning on discussing the ones in Pompeii Lepcis Magna and a few others. I'm currently discussing how important the Forum was in everyday life for the Romans. Do you think it would be a good idea to look at floor plans of all the different forums in the cities and analyze the differences and gather an analysis from that? ie see what buildings have changed, whats grown larger/smaller, disappeared/added and so on...