I am not sure what correct OE is but awhile back I figured out my former B-van (318) had the same thread pitch used on my Shadow (2.2). The drain plug on the Shadow is still the original at almost 25 years old and it does not drip a drop at all. Took care of the drip the van always had.

Looks like 440 source is selling the auveco sourced plug. It runs about half the OEM one but looks identical.
http://store.440source.com/Drain-Plug-Factory-Style/productinfo/109-1522/