We have a 74 gallon Transfer-Flow tank, the are made in Chico, CA, their website can give you nearby dealers. It was on the 2003 truck when we purchased it, so I can not give you the equipment and installation costs. It has performed with out problems, great to have the long range capacity.
Well, thought about it on our ccsb,
but CERTAIN individuals kidneys require stops anyway so..................
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ATI ( Aluminum Tank Industries) make great fuel tanks and toolbox tank combos. They are made in Florida and will custom build as well as have many stock ones to choose from. Mine is a combo I custom designed holds 54 gallons and lots of room for storage. I'll post some pics tonight.