Patternflyer76,
Look at some of the early videos from this guy, Bob in Oklahoma. He's building a 14ft long B1 bomber and makes all his own plugs and molds. These aren't step-by-step videos, but there is enough information for you to make your own plugs and molds. Start at the beginning. He's done over 100 videos documenting the building process. He is an expert in making fiberglass parts and planes. It's riveting. Best of all, its FREE!!!!
http://www.youtube.com/user/hornitpilot#g/u
Thanks
CAsniffer