I use the Ride Str8. It works well and was easy to install, the owner is also a nice guy that will go out of his way to help you or answer any questions.
Thank you everyone for you great response. After reveiwing several of the web site suggested and had the apportunity to look over each design I decided to build one and put some of my machining tools to use since several of the design are basically the same and the material required I have laying around beside the heim joint rod ends.