While all of the revenge advice dispensed in these waters might be amusing and fun to play out in your mind, keep it right there. In your mind. If you attempt any of that childish nonsense you'll end up either in custody or at the wrong end of a lawsuit.
File suit in small claims court. Have that served on him, I assume it's a 'him', by a professional process server, don't do it yourself.
When you get to court be prepared with all of the documentation, photos, witnesses, etc. you can muster to support your case. You will prevail. Either the defendant will not show in which case you will get a default judgement or you win on the facts. Assuming they are exactly as you have stated them.
Once you have that judgement in hand, he's yours. You then get a Mechanic's Lien on his entire business, not just the vehicle. The local sheriff will be happy to serve it for you. At that point, he either satisfies the lien or is out of business and you take possession of whatever assets named in the lien.
The exact procedure varies from jurisdiction to jurisdiction, but that essentially is the way it works. You'll have to front some money, court filing costs, process servers, lien service, etc, but all of that is added to the judgement and subsequent lien. You'll get it all back.
You might search this sand pile for an old post wherein I told the most entertaining story of my boss at the time doing exactly what's outlined above and, for the price of a leather sport coat, ended with serving a lien on one of PSA's airplanes [the airline is now defunct having has one of their airplanes land early in downtown San Diego in flames] about to depart San Jose International Airport. He said, after it was all over, that it was worth the price of admission just to see the various PSA people running about insisting that 'You can't do that!' while he and a sheriff's deputy were indeed doing it.
