Been working on getting this done the past 2 or 3 weeks. 1st dealer was an ass, second was nice but said I would need to talk to corporate. Then it was back to dealer customer relations, then district rep, then back to corporate. Every step of the way the answer was "parts are no longer available". I explained every time that there are just a few hoses that are discontinued that could be replaced with bulk fuel hose, everything else is available, including the tank. I even offered to provide pictures of service invoices posted here showing what parts had been used at other dealers.
I finally got a definitive answer from my case manager at corporate that parts are "no longer available according to our technical compliance department" and they would not be able to do this work. He understood my reasoning of why I thought they should do the work with bulk fuel hose. But the answer was ultimately no, and there was nobody left at the corporate level for me to talk to. They are happy to let me buy a tank on my own or buy back my truck.