My guess is that since your body shop is not certified by ford for aluminum work (assuming this since he doesnt have their tools,) they wont even talk to him about the parts. I just checked some part numbers in quite a few different parts interchange catalogs. - 100% the same bed part numbers 2017-2018 all the way through. Ford not selling beds complete is not something new, they typically dont for most offerings, this is why people seek out a salvage bed assembly, assembled by the factory like it should be. I happen to have 2 one in white and one in silver - would probably run close to $3k+ shipped to Cali. PM if you need one.