Get merc injectors or nozzles, late 300TD. They are the same as the VW ones with more flow.
i've heard differing opinions on running merc injectors. Some saying you can get the same flow out of new stock 1.6 or 1.9 injectors. Some saying the merc injectors physically flow more. Its still up in the air for me. I have found a site that sell them though. http://www.adiesel.com/products.php?deptid=18545