When we produce our first ever prototype all our parts came from a jap spec Toyota MR2 (RHD), but we change the rack & pinion to the left to show and sale the car in the US market.
You can see too in our web page in ABOUT DDR we offer as and Optional Part the RHD chassis, please check
http://www.ddrmotorsport.com/about.html
Thank your for your question.
The DDR Team