|Fuel accumulator and the in-and-out lines. Ugh.|
Little progress, I suppose, except that the worst was confirmed. After days/weeks of soaking in WD-40, and gentle pressure with wrenches, the fuel accumulator was broken/hacksawed free. Including the flare nut on the steel line going to the engine. So the entire line may need replacement.
Next: clean the gas tank in the car, via the top (fuel gauge sending unit) and bottom (filler neck) holes. Next after that: a run to to the Detroit VW Guru's parts store. Hang in there, Hotshoe... It'll be sweet when it's running again.