These are new from RC Art and are reproduced from URAS Gang 1:1 scale underflap and canards and are officially licensed. This package is available now for around $12 USD and comes unpainted so you can finish it in whatever color you wish. The underflap and canard set is pretty universal however make sure you measure your body before purchasing to avoid any frustration.
The underflap is 197mm wide and 77mm deep. The canards come in 2 different sizes as you can see in the pictures below.
Source: RC Art