Just to clarify Nick's situation for those who don't know the back story. He is not and IIRC, never was, a JW. There is nothing the congregation can do to him except via his wife.
Nick, the shunning practice is hateful and disgusting. It is SO obviously for the protection of the organization, keeping the rank and file oblivious to the thoughts and feelings of the DFd person, that when they couch it in the language of their twisted version of "love" it makes me want to puke.
But what exactly is your goal in the immediate short term? Would you like your wife to soften her stance on shunning? If so, perhaps finding examples of JWs who are in good standing who are moderate on the issue. I know a MS in good standing who does pretty much everything with his DFd son and his wife and their kids - all worldly. Family associations are a conscience matter, unlike the shunning doctrine for non-relatives. Perhaps you can appeal to your wife to exercise kindness that you know exists within her to attenuate the sense of justice in her Borg-trained conscience. I don't know. It's a tough row to hoe.
Good luck. Don't let the Borg ruin your marriage.