For anyone interested, the conclusion to the story.
Having come to terms with the failure of the mission, I did as Julian suggested and turned to eBay. Picked up a microphone signed by the lead singer, Hannah Reid, for about $50.
The story will go something like I reached out all over the internet, people put me in touch with other people, blah blah blah, somehow got connected with the owner of the club who said he could make something happen. After the show, he emailed me and said Hannah signed the microphone from the show and its at the club for me to pick up.
Whatever... the truth is what I say it is.
