You might want to contact the Attorney General in the state where he is. A lawyer could give you other ideas of what can be done.
In the future, I would have someone go check the parts out and secure them at time of payment .I know this is not possible sometimes.
I have had other enthusiasts and friends go check out parts and cars for me. This has worked for me. I have also checked out cars and parts for others.
Good Luck!
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