I don't know *anything* about alloys and nonstandard rims for vanagons, but
this seems like too much of an amazing deal not to post:
http://www.ecstuning.com/Search/ES2153836/ES2153836/

I'm not in the market for 16" alloys but maybe someone else is.  Do these
fit vanagons or are they the wrong width or bolt pattern or something?
Maybe someone will at least want them for a different volkswagen.

There's also this set (audi) even cheaper:
http://www.ecstuning.com/Audi-B5_A4-FWD-1.8T/Wheels/OEM_Alloys/ES2142877/