Need 500 email ids

Hello All, I own a transcription company that transcribes audio/video content for large companies, content producers, magazines etc all over the world. I am now looking to expand my business. So this is what I need. a.) 250 email ids of conferences that are happening in the US in the month of July/August. b.) 150 email ids of conferences that are happening in the UK in the month of July/August. My budget is $5 therefore please bid for $5 and one hour. Thanks