WTB Stiffening Plate, Skid Plate or Sway Bar

1. You can buy the BT Tech Stiffening Plate, Skid Plate and Strut Tower Brace here at the PriusChat Shop.

2. There are no aftermarket sway bars specifically made for the Prius.

If you want bigger sway bars, you can consider getting the Touring Edition's front and rear stabilizer bars which are a little bigger than the Standard's. You can get them through your Toyota dealer or Sigma Automotive or an online Toyota OEM Parts site.

If you want a significantly bigger rear sway bar, you can try one that is made for the 03-06 Corolla or Matrix, which I understand also fit the Prius. As far as I know, there are at least three available:

-- Premier
-- TRD
-- Hotchkis

 

In the Private Sales Forum, I see someone selling a used Stiffening Plate -- http://priuschat.com/forums/private-sales/54809-slightly-used-bt-stiiffening-plate.html

Good luck.