There is a 5th seat for a Westy for sale on ebay.  It is brown and
located in California.

Too bad it'd cost like $1,000,000 to get it shipped to me, I'd really
like to have one (not for now, but for future)

http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=262210488

Keith (who has no connection to this seat!)
Calgary, Alberta, Canada