German Transaxle also offers the Peloquin Differential in their rebuilt automatic transaxles. It is not listed on the website but when I emailed them they said it is a $1200 upgrade.

http://www.germantransaxle.com

Date:    Mon, 10 Mar 2014 08:26:21 -0500
From:    JRodgers <jrodgers113@GMAIL.COM>
Subject: Peloquin Differential

Had a nice chat with Gary Peloquin - the creator and manufacturer of the
Peloquin differential.

It is the case that nobody gets a Peloquin diff for the Vanagon
auto-tranny unless they get it from Go-Westy. They have exclusive rights
to it.

John