I have been looking for one since i got my rocket and was trying to decide to get the side mount or just the rivco one. I decided to just get the rivco one and i couldn't find it on the rivco site for some reason. The New Bonneville website(Newr3.com) has it listed as discontinued. I just ordered one from extreme metal products for 39.99. If you use the coupon code Maverick Forums you get 10% off. Just wanted to share in case anyone else was looking for a rivco type relocator. I posted the link below.
http://extrememetalproducts.com/i-13354306-triumph-rockit-iii-license-plate-bracket.html
http://extrememetalproducts.com/i-13354306-triumph-rockit-iii-license-plate-bracket.html