You may want to check out a local auto electric shop.  I had a Vanagon
alternator refurbished recently.  New bearings, rear bearing carrier,
brush/regulator assembly, trued slip rings, thorough cleaning and
testing.  $72.  Has performed flawlessly for 2,500 miles.  Will be taking
in the alternator from my wife's Jetta soon for a like treatment.

Tony

Anthony L. Mourkas
Hampden, Maine, USA
1984 Vanagon Westfalia
1987 Vanagon GL Syncro
1991 Jetta Eco Diesel