You can order that hose here but any oil rated hose of the right ID would work. I think NAPA has the correct fluid. I can message you a good place to get the fluid for cheap online if you want.

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Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon.