If you want to make some killer composite parts, one of the masters at making molds and such is Windy Urtnowski. It may be a little more than you're looking for, but worth thinking about. He uses two-part RTV silicone rubber for molds. Give him a buzz and he can fix you up with tapes of all the info you can possibly use.
http://www.windyurtnowski.com/
[email protected]
Phone 201 896 8740
Fax 201 896 8740

Windy Urtnowski
93 Elliott Place
Rutherford NJ 07070
USA