Now I feel very silly....
Took a look at Bus Depot catalog and found this part without much searching.
Sorry. �I hope this gets to everyone before someone makes great pains to find me the part number.
Cheers, Anthony'89 Syncro GL (Hidalgo)

--- On Wed, 12/8/10, Anthony Egeln <regnsuzanne@yahoo.com> wrote:

From: Anthony Egeln <regnsuzanne@yahoo.com>
Subject: Voltage Stabilizer in Instrument Cluster
To: vanagon@GERRY.VANAGON.COM
Date: Wednesday, December 8, 2010, 12:49 PM

I've been asking around about getting a used instrument cluster so that I can get one with a good voltage stabilizer (mine won't produce the 10 volts needed).
Then I did an archive search and there was a post back in 1998 about this part. �The upshot was that the voltage stabilizer should be replaceable with any matching 10 volt part. �My local shop also confirmed he only wanted the voltage stabilizer, not necessarily the entire cluster.
It would be good to get the OEM part though. �Could someone with ETKA please search and see if there is a VW part number for the voltage stabilizer?
Any ideas about replacing this part are welcome. �I want to have a working coolant temp gauge soonest so I don't endanger my new wasserboxer.
Thanks,
 Anthony'89 Syncro GL (Hidalgo)