Brian:
Have a few pics on my website showing the spot where the aftermarket Ronal
wheel will conflict with your steering linkage. URL is below, just go to
Suspension / Wheels&Tires.

Ronal USA, located in Southern California, sells hub centric spacers that
will work with those wheels you have.  Be prepared for a less than positive
customer service experience when you deal with them though.
www.ronalusa.com
EPI wheel studs in adequate length can be had at several online vendor
locations for the rears.

I got my studs from here:

Discount Import Parts Service - Tigard, Oregon
(10) 14mm lug studs X 2.20 (for rears) - Empi 78-2810

Here's the stuff I got from Ronal:

(10) LugBolts Ball Seat - M14X1.5X 40mm (for fronts)
(10) LugNuts Ball Seat - M14X1.5 (for rears)
(4) 12mm spacers - 5X112

Brent
www.weidefamily.net/vanagon/