Sorry to hear it was not the easy fix. Definitely try the injector it cost about $30 with a seal and holder and takes about 15mins to do, very cheap fix.
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)