Here's a posting on Virtual Vairs:
Message: 1
Date: Mon, 8 Jun 2015 12:44:05 -0400
From: "Thomas Gould" <tgould@hargray.com>
To: <virtualvairs@corvair.org>
Subject: <VV> For Sale - NOS Crown Posi Diff
Message-ID: <C211FB8A0A724D6AAEF84B975D3C1F54@GouldPC>
Content-Type: text/plain; charset="iso-8859-1"
NOS Crown Posi diff. Complete (with bearings) $975. Tom Gould Beaufort SC , 843-812-5373, tgould @hargray.com.