http://gowesty.com/ec_view_details.php?id=21890&category_id=&category_parent_id=

8mm spacers for $5/ea at gowesty.  That's what I used for ET 37 Mercedes 8 hole wheels, 15 x6.5.  By the time you're done buying what you need, depending on the price of the used wheels, you will not save much over just buying a new set from van-cafe, and that doesn't include your time making them fit.  The quality of the Mercedes alloy wheel is better though.

You will have FAR FEWER choices in a 15" tire than in 14.  The 15s or 16s are good if you want a larger tire and more ground clearance.

--- On Sun, 9/4/11, James Felder <jim.felder@GMAIL.COM> wrote:
> Ok let me amend my statement on
> spacers to say that I want to avoid any wheels that require
> hard to find spacers.
>
> Jim
>
> On Sep 4, 2011, at 7:01 AM, J Stewart <fonman4277@comcast.net>
> wrote:
>
> > Why no spacers? I have them on my '85 in the front,
> only a minor PITA to deal with when installing the front
> wheels. Someone else made the comment "good luck finding
> them" I had no trouble getting them from Van Cafe. Lot of
> mis-information on this subject. I eevn tried to sell my 15
> rims/tire a while back,, and one person told me they'd need
> to bored out to fit his Vanagon-EVEN AFTER I SENT HIM PICS
> OF THE WHEELS ON MY VANAGON!!!
> >
> > Jeff Stewart
> >
> >
> > Ben;
> >
> > I want to change wheels to expand my now-dwindling
> tire choices for my 1983 diesel Westy five speed. I am not
> looking to regear the drivetrain, and I don't care if I end
> up with alloys or steels. Some drilling doesn't scare me at
> all.
> >
> > What I don't want:
> >
> > $$$
> >
> > Interference on the car or in the spare tray.
> >
> > Spacers.
> >
> > Anything underrated for the weight of the car.
> >
> > Thanks,
> >
> > Jim
> >
> > On Sep 3, 2011, at 11:17 PM, BenT Syncro <syncro@GMAIL.COM>
> wrote:
> >
> > > Subject has been covered a zillion times here.
> > >
> > > Bob those CLK alloys are 16". He asked about
> 15's. Some aftermarket MB clone wheels have an offset
> comparable enough to fit. There is no exact fit. Just an
> acceptable one.
> > >
> > > Jim, you will need to narrow your question. 2WD
> or Syncro? Big brake or not? Alloy or steel? There are many
> acceptable options.
> > >
> > >
> > > BenT
> > >
> > > sent from my electronic leash
> > >
> > > On Sep 3, 2011, at 8:46 PM, Robert Stevens <mtbiker62@GMAIL.COM>
> wrote:
> > >
> > >> On Sep 3, 2011, at 7:38 PM, Jim Felder
> wrote:
> > >>
> > >>> What are the 15 inch mercedes alloy
> wheels that fit the vanagon with no
> > >>> spacers?
> > >>
> > >> I "think" they are these:
> > >> http://www.originalwheels.com/mercedes-wheels/clk1998rims.php
> > >>
> > >> BenT will likely chime in with the correct
> info though.
> > >>
> > >> bob
> >
>