Gear Vendors doesn't seem to list a unit specifically for a 3-speed manual on their site. However, they do say, "should you not find your specific vehicle listed...rest assured that we can provide a unit which is designed for your application. Just e-mail us today or should you wish to talk to one of our application engineers just call 1-800-999-9555."
The big drawback to the Gear Vendors units is $$$$$$$$$. In many cases, it would probably be cheaper to swap in an overdrive tranny.
