>>Does any one have a source for wheel spacers (need 10 mm) and extended
>>bolt kits/wheel lugs to fit our Vanagons?

Chris,
I bought the extended bolts for my front wheels from the local wheel repair shop (Regina Wheel Works) were I had my Audi rims refinished.  They also had nuts for the back studs.  I bought the longer rear studs from Ben Tan  BenTbtstr8@aol.com.  The four 1/2" (12.5mm) spacers were made from aluminum by a local machine shop (Pino Machine Shop).  I brought in the wheel I was going to use and asked them to match the back mounting surface.  I then glued the spacers to the back surface of the rim.  Everything worked out fine.
Good luck,
George
'85 Westfalia