I bought the 15 " Rhein wheels from Ken at Van-Again…….no spacers or anything else needed.
You'll have to look and see if he still sells them.
Anthony
      From: Michael McSwain <michaelmcswain@GMAIL.COM>
 To: vanagon@GERRY.VANAGON.COM 
 Sent: Saturday, December 27, 2014 2:03 PM
 Subject: 15" Wheels
   
Hey all,

I know there are a few mile long posts on the samba about this, but I
always end up feeling like I'm drowning in information over there.

Does anyone have any suggestions on a 15" wheel conversion that requires
the most minimal of modifications?  I found 2 sets locally for $250 that
I'm thinking about getting but I'm not 100% sure if they'll fit or if I'll
have to go get spacers/long lugs etc. They came of of a '95 E320 and a '95
C280. The look just like the ones Gowesty sells.  I'm going to go back out
and get the wheels measurements off of them on Monday.

If I had the budget I'd just buy the gowesty kit and I'm trying to figure
out if I'll end up spending close to the same after buying all the
necessary accoutrements.

I'm not married to this style and I'm more concerned about handling and
performance than looks.

Thanks in advance.

Michael.