I have a Premier Cycle Accessories Passenger backrest but unfortunately it only will work with the Premier Cycle Accessories adjustable rack...see the link below....it has never been mounted or used....my wife likes the Corbin backrest better....sells new for $195+shipping....will let it go for $175 including shipping. PM me know if your interested. Thanks.
http://www.pca-one.com/productDetail.asp?productID=4868&RetURL=search&search=bike&bikeType=&bikeMake=Kawasaki&bikeModel=Concours 1400&bikeYear=2010