He's no longer around.  Try eBay or maybe someone here has one they are willing to sell.

SurvivingPhilly may have one he's willing to let go.  I can't remember if he had the SuperBrace or TKAT.

You’ll get strong opinions both ways.  I’ve had both on different bikes.  I can’t say one works better than the other.  I noticed modest improvement when braking and stability at highway speed.  Nothing dramatic and it won’t turn the Savage into a sports bike.

If you can find a decent and affordable used one, I’d do it.  I wouldn’t pay for a new one or overpay for a used one.