I *think* the material is called "Fiberfrax" - it is a fiberglass-looking material with high ceramic content and several experimental class aircraft use it for firewall/fireblocking. You can get whatever you need for this from Aircraft Spruce. There is an EZ builder's group on the net and it is also possible that RAF (Rutan Aircraft Factory) will have an answer. Where are the builder's logs and assembly manuals for this aircraft? You may also find what you need in there. Best Regards, Echo Mike (Strange formatting caused by Firefox)