Gabapentin is prescribed for neuropathic pain and you aren't going to be able to fake that.

I think it is also time to just do what the doctors say, no matter how much you disagree. Trying to do it your way hasn't been working so well for you lately. Asking to slow the taper is a good idea, finding a different pdoc who will prescribe the gabapentin is a good idea. Not abusing it is really important. Things are never going to straighten out until you are working with your treatment providers, not against them.