I need a creative email written to design agencies not hiring

Topic: Creative Crusader
Tone: Informal/Casual
Extensive research needed: yes
Extra notes: I am a graphic designer and I would like to send out an email to design agencies that aren't advertising a job, but that I would like to try and arrange to get them to meet me for a coffee. It needs to be highly creative but also professional.

Please could you send me a few examples of your work with your proposal.

Once I have found someone I can discuss a few ideas I have.

I need this done in the next few days so please just apply if you are available to start straight away.