I do have a Silverleaf cable I no longer need. Since we no longer full time we traded in our diesel on a gasser!
If you are not familiar with it, here is webpage for VMSpc | SilverLeaf Electronics, Inc.
The program is free, you can download it and play with it all you like, but you have to have the cable to get from the plug under the dash to your computer!
I will PM you with my contac info! If you have questions contac me!