Colin,
You probably know about this Ferret for sale in Tulsa, OK, USA:
http://www.khakicorpsimports.com/in-mk1.htm
The seller notes:"This Ferret was used by the Canadian military during its service life. The sale will include a set of British manuals for the vehicle. Since this vehicle will require work to become operational we are selling it at a very reduced price."
HTH,
Hanno