Fuel Cell fillers

Anyone have any pictures of GCR legal fuel filling setups that have on their cars?
I need a fuel fill outside the car (preferably in the stock location ) for the enduro, but am struggling with an elegant solution to the steel barrier required between the fuel fill and passenger compartment.

thanks!
Marcus

The bulkhead doesn't need to be steel. Aluminum works fine. As long as the fill and vent tube is shrouded and not exposed to the cockpit should be legal.