Dictionary definitions of Fraud:
1) deceit, trickery, sharp practice, or breach of confidence, perpetrated for profit or to gain some unfair or dishonest advantage.
2) deliberate deception, trickery, or cheating intended to gain an advantage
Although the legal definition may vary from state to state, basically fraud is 'knowingly deceiving someone for the purposes of gaining an advantage over them, or which 'injures' them in some fashion'.
Representing any items falsely (and knowingly) for sale/profit is fraud. if the seller doesn't *know* the car is a fake, then he is just ignorant, and not necessarily fraudulent.
building a 'clone' for one's own purposes is not fraudulent (No one is being deceived? and No one is being 'injured').. at least not until the builder attempts to sell it under false pretenses!