> Does anyone know of a readily available rear wind deflector that
> will easily
> mount to a Westy?

here's another company selling the vortex generators ... these appear
to be shaped more like the ones on airplanes, though ... which i
always heard were on the wings to reduce laminar flow and increase
turbulent flow across the control surfaces at certain angles of the
wing.
anyway, this is someone else's way of doing the flow separation on
cars ...
http://www.sigmaautomotive.com/performance/vortekz/vortekz.php

the first picture on the following web page is what i remember the
ipdusa.com vortext generators looking like ... a strip of plastic with
molded generators.
http://choondiy.blogspot.com/2008/05/pem-part-iii-vortex-generator.html

joel