This morning, I found the Zerex G-05 at the larger NAPA store in town, so I just bought it. But this thread may still be interesting for those having a hard time finding the Zerex locally.

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'82 240D 224K miles manual transmission
mods: wooden 4by4 bumper, EGR delete and older EX manifold without EGR port, glass pack muffler (cheapest replacement muffler), rebuilt bosch injectors with Monark nozzles

working on: aux electric fuel pump, coolant/fuel heat exchanger/filter head, afterglow, low oil pressure buzzer/LED