There are several aftermarket products available with similar names. Steer Safe, Safety Steer, and Safe-T-Plus. We had a Safe-T-Plus put on our old motor home back in the late 80's, and it did improve the handling; from its modus operandi, I'm sure it would have been indespensable in a blowout.
I've since read positive reviews about that and the other brands, so I think any are worthwhile considerations. Personally, if I ever put such a device on our coach, I will go to Henderson's in Oregon (a BAC sponsor) and get their opinion, because they are about as knowledgeable about such things as any company around, and I trust their input. But then, they aren't all that far from where I live. You don't have that advantage, but it might be worth a phone call to them for a recommendation in addition to those you glean here on the Forum.
Safe-T-Plus info is at http://www.safe-t-plus.com/our-products/
Joel