The older VW Rabbit Diesels used the same hose but of coure the have their own part number.
If you need something to stop the leaking right now regular 3/16 Vacuum hose will last a few weeks but could save you money on fuel if you are leaking right now.
Silicone Vacuum hose (the brightly colored hose) will last at least a year but gets rock hard and is sold in the Autoparts Chain Stores.

Post #2 has the part numbers.
fuel return line replacement part

I bought my return line from Ebay sellers when the price was right as I have 2 vehicles that use the same size hose and it is useful on some gasser applications to.

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84 300D, 82 Volvo 244Gl Diesel