Dta Collection required

I am wanting email and name data collecting for all companies attending exhibitions at the NEC and Excel this year. Exhibitions starting from July onwards. I have a list of ones I am particularly interested in. We are using the data for email marketing purposes, so the data has to be good quality. All data will be checked prior to use. If you can help please contact me, I want to get this project started today. You can give me a day rate with an estimate of how long the project will take or a fixed project cost with a deadline. Thanks Kim