I bought a manual for my 90 GL at the parts counter of the local VW dealer (Bozzani, Covina, CA) for $5.00.  They had many for different years and models in a box.  I figured they removed them from the trade-in vehicles (since I had just purchased my used Vanagon from a different dealer without a manual or the jack kit).  So check your local VW dealer they may do the same thing.
Loretta
90 GL
87 Syncro

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