Rather than overpriced 911 studs, I had late model Chevy truck studs
pressed into the front and rear hubs for my '74 kombi.  They have the same
14mm thread as the Vanagon studs, just longer.  I'd also heard of Dodge
Dakota studs being used, but they are 13mm and I don't like the idea of
downgrading anything.  The Dakota is a six-lug, so the skinnier stud isn't so
much of an issue.  Geez, first Chevy studs on the '74, now a Blazer Tire
carrier on the Vanagon.  That free '85 Celebrity I've been driving must be
getting to me!
-chris