I have the Brake Buddy Vantage, which is portable. Works well, but the down side is it takes about 10 minutes to get it ready to tow and then you have the box to contend with. Once you set it up a few times its not difficult, but requires you get on your knees to hook up the brake pedal bracket. Mine is proportional or direct pressure.
So sorry to hear that. While we usually trade our Honda CRV every 4 years or so, we can no longer buy a new one since we tow four down. I hope our 2013 lasts until Honda changes their mind, or we have to get another brand. Honda, not a great decision, IMO.