I've a Transit Connect with 500ltr tank fitted across the bulkhead. When I bought the tank, I had the option of purchasing the bulkhead fitting kit, which I did and it works fine. Toucan Supplies was the firm. Easy enough to fit. Just framework with correct bolts and you drill 4 x holes in the bulkhead, these bolts have hooks on, while the framework sits around the tank, bolts from the front of your tank go back to the hooks on the bulkhead to be tightened and adjusted securely.
Sorry, but I don't seem to be able to upload any pics.