Here is a Viton Hose kit for all the 126 SD's from Greaseworks.
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http://www.greaseworks.com/store/product_info.php?cPath=27_41&products_id=188
As well as their bulk hose section
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http://www.greaseworks.com/store/index.php?cPath=27_43
The hose kits include all the fuel hoses in the car, new hose clamps, and instructions. If you buy bulk you'll need to get the injector return line(1/8") as well as the 5/16" hose. The Viton is very expensive and biodiesel resistance. They also sell the SAE 30R9 hose which is viton lined and much cheaper, and a better hose for car applications, it's a little more durable. You can often find 30R9 hose in your local auto part house. I've used both for many years, and trust both, but the viton lined stuff is much cheaper. You can use standard hoses but they won't last as long, but will be much, much cheaper.