Another chance for looking at a variety of factory and home built Sprinter modifications - including 4x4 conversions, but not any closer to LA, is the upcoming West Coast Sprinter Fest in Tualatin OR, on April 14, 2012: http://sprinterstore.com/nw_sprinterfest.htm
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Spenard
1991 VW Westy (N8IV) aka Vanna, of Ashland, OR
2012 Sprinter RB SMB PT (ALCES2) aka Moose, chill'n in Anchorage, AK