I believe you're asking for a Ford GT then, not the 19 million Cr. race car, which can't be traded. You should probably edit your OP to reflect that, so people will understand what you're after .
I dont understand these wants as all you have to do is do two seasonal races and you can buy any of the ford gt's apart from the one in the gran turismo dealership. Have people lost the love of driving in this game? The ONLY two cars I have cloned or cheated to get is the x2010 prototype and the SV X2010 before i knew i would get one from b spec anyway. Other than that i really cant help but think the only cars people should really trade are the UCD cars as some of them can be hard to find.