Well, you may not necessarily need Viton hose. It's been determined that the reason hoses start to leak after using B100 biodiesel is because they're OLD, not because of the material they're made out of. I'd just go and purchase some brand new rubber fuel hose for your car, it will stand up to B100 use just as well.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.