Walter,
There are a couple of places in the UK that make them. One is Honeybourne Mouldings, they make fibreglass bonnets. They apparently make the SAH GT-style bonnets. The other is Jigsaw Racing, they make both fiberglass and aluminum LeMans bonnets. Jigsaw's site says "Fibreglass - Sit down and call. Aluminum - Lie down and call!" /ubbthreads/images/graemlins/nopity.gif