Hi Nick ~ Try not to give up on Copcar (what a great name!) I have a vocal cat too. I've had her for 4 months now. Just like GingersMom said, you may just have a "talker" on your hands. I know it is maddening (I KNOW what you are going through), but try to be patient (I also know that is not the advice you probably want!)
We've taken our cat to the vet multiple times to see if there is anything wrong with her. The vet finally determined for us that she probably has anxiety issues and that she should take fluoxetine (Prozac). We tried that for about a week and she just wasn't herself anymore - hardly eating, lethargic, etc. It broke our hearts. We decided to try and live with the meowing for now in the hope that as she gets older, she will calm down and become more settled. (She was a stray that we adopted and the vet thinks she is about 1-2 years old).
Believe me, I DO KNOW how bad it can be to listen to the non-stop meowing every waking moment, but just keep trying different approaches with Copcar. We're even trying Feliway plug-ins because the vet said it could calm the anxiousness.
If you take Copcar to the pound, just think, no one may want him or if he does get adopted, then he may end up in another home where he is just given up again.
OH - and do you talk to Copcar at all while the meowing is going on??? At first we'd ignore our cat for 15 or 20 minutes and then give in and try to calm her somehow. Now if we completely ignore her, the meowing goes on for 30 or 40 minutes, but then she'll calm herself down eventually. Maybe try ignoring him - don't give in by talking to him or petting him...
I wish you the best of luck!