I doubt you are gonna have much success, but you can try. You'd probably have to bait him, say you are sending something lucrative and be there the day he has to sign for it and confront him then. I was gonna say maybe he had health or family issues or even died, then changed my mind...
Because it looks like he's been doing this for at least six years or longer. It's all over Silencer Talk, they were talking of a class action suit back in 2011. Consumer Complaint Board has several unresolved cases dating to back then, including sent suppressors and taking cash for orders and not delivering. Sounds like he has his scam solid and nobody has really held him accountable. Could be a front for cartels to acquire shit too. Their site looks legit, still, I only use CC's and send stuff signature delivery.
It's amazing this guy is still able to fuck people over, why hasn't ATF raided this guy? Have you talked to anyone at your local ATF office? Show 'em what's been going on, give 'em your proof (I know you sent this signature delivery and didn't try to save $10 or some shit on shipping that?). I bet they'll call up the office in Texas and arrange a visit.
But then he'll be going to jail and then tied up in court shit --if anyone gets any money it'll be his defense lawyer, not you.
A civil case would work, but I'm willing to bet this guy is pretty savvy at avoiding summons. Just show the judge what the fucker's been up to since 2011 and your proof and it should be an easy to win case, but I'm no lawyer. After you get your money and shit back, THEN turn him into ATF and let them deal with him.
Just wow. Thanks for bringing this POS into the light, you should go to the "good guys" page and mention this there too.
But wait... This is also the guy that sold you the can originally!? And agreed to work on it? How'd you contact him then? Email? You're likely gonna have to bait him with another computer and tell him you are sending can(s) for work like I said. Get a lawyer, get the case ready and send an empty box. They can deliver the summons when he signs for it (in some cases they can even play the delivery driver). I bet he goes to work and answers the door for that.
Then again, it crossed my mind he could be in jail already; he's fucked over a LOT of people and he's gotta be on ATF radar. They may have been waiting to let him commit more crimes. In which case you need to go about finding out how to get your shit out of evidence, if you can.
Next time stick with Sico, TBAC and the gang. Sorry to hear about your troubles. Hope some of this is of use.