Flexible v-bars
 

I can't check every thread, but I did notice on the Subaru parts website that they list flexible V-bars on the site under part #E4010CC100.

It also appears to be cheaper than ordering 2018 tS v-bars.

I have them on my car. It's not a huge difference, but there's a bit less understeer and a little more compliance over rough roads.

Based on BRZ reviews that sounds like exactly what the car needs.

The difference is that they are now available stateside without importation or buying the tS bars.