I visited your booth at (Trade Show Name), you guys have a great product! After learning a little more about your company, I had some thoughts on how I might be able to help you drive some more sales revenue.
I know you're probably super busy so I posted my concept online for you to look at when you have a minute. You can check it out by using the information printed above.
I'll take down the information I put online after a week or so. But, if you want to see it again after that, just email or call and I'll send it your way.
I look forward to hearing what you think and talking further.