..My comment is, save yourself over $1000, get the Readybrake and be done with it. You'll be glad you did. :)
No electronics to foul up and over-brake your toad (like some electronic systems are known to do). No tapping into your toad's electrical or brake systems. Nothing to have to put in and take out all the time like you had to with your Brake buddy. Just a simple cable operated brake system that simply works and costs much, much less than almost anything else.
Not really surprising your dealer is pushing the Invisibrake (think $$). If they won't install the Readybrake cable on your toad, it will not be hard to find another place that will do it. It is a pretty simple installation, just a physical cable linkage from brake pedal to front of the vehicle. Lots of people install it themselves.