sad to say but carjacking/carnapping will be with us for a long time as long as there is a public demand for second-hand car parts due to their availability and usually cheaper prices compared to the brand-new OEM parts.
so to discourage would-be carnappers who want to fill the shoes of fallen criminal comrades, let us not buy second-hand parts if we are suspicious that these items are from illegitimate sources. also, let us not patronize second-hand stores that we know sell illegal "chop-chop" parts.
there will be no supplier if there will be no buyer.