That sounds good I like Chris's Products.
Just fitted his bumper onto my van, getting the winch system and lights put on tomorrow.
I thought Transfer flow actually made a tank for the E series, the Titan tank listed above might work if you Fabricated a system to hold it in place and then also to run the fuel all the way to the main tank or to the fuel lines, but still it is not an exact kit or fit. You would be doing some serious tinkerin.
I just want to buy something ready to go and slap it in place, I don't mind getting dirty but I don't have the time to Fabricate some shopisticated solution.