fuel tank filler hose replacement

[gramps77]

I inherited my grandfathers 1977 Heavy Half that we used to pull a camping trailer with and its in great condition other than sitting in the drive way for 5 years with no care.
Its got dual tanks and both sides have both filler and vent hoses that deteriorated beyond use. I see many sites that have either the filler or vent hose available but not both at the same place. What have you guys used to replace these hoses and where did you get it? Thanks
Just so it's clear I need both vent and filler rubber hoses for both tanks