Ball joint beam???
If so there's not much choice for dropped spindles.
They are f*kn expensive http://transporterhaus.de/index.php?opt ... Itemid=163
or welded, which is a no-go for cert
Depending on how low you want to go, you can just run adjusters http://www.wagenswest.com/partstore/ind ... sters.html
want to save some coin then just run one.. I'm running with one only and the ride is surprisingly great!
Out back you can just turn your springplate 1-2 notches, fit boomerang plates or run with adjustable springplates
That's pretty much the basics of it.
Here's mine that is running one adjuster up front and adjusted 2 nothches out back. Lowest point up front is approx 110mm.