There are no other VW modles using a handle that will substitute.  There are
a few other rear hatch locks that would probably fit, but the keyway would
be wrong and can't be keyed to match.  That's also the case with the
ignition.  The key  for a Vanagon is not used for any other vehicle.
Steve Sandlin, Registered Locksmith
Steve's Lock Shoppe
http://www.steveslockshop.com
'84 Wolfsburg Westy
'79 Transporter
'00 New Beetle