I went online to Perrin and they confirmed a rear '08 wrx bar and end-links for the 2013 legacy.
I asked them if they have ANYTHING else...they said NO.
I'm now wishing I went with 17" rims as the car is stickier with the 225/55/16, but I can feel the taller profile leaning over. Maybe part of it is as simple as the body lean.
I asked Perrin if they have a front bar as well but they don't. As I said, the car is fairly neutral, and today I pushed it through a long on-ramp. It stayed neutral, but that darn profile and body lean is too much.
The saving grace is in the cost of the rims and tires and weight.