Has anyone ever has an elective 3D/4D ultrasound company come to you?

We were considering hiring one for our baby shower, normally I wouldn't consider doing something so "extra" but this is our miracle baby and kind of a big deal for our entire family. I want to do something special so everyone feels included. I have 140+ people invited to my shower, (its co-ed and kid friendly) and we thought about setting up a huge tv or projector and having an ultrasound company come in to do a live 3D/4D scan during the shower. Maybe 15-20 minutes long or so....

If you have done this what all was included in your package and what was the price range?

There are only 2 companies in our area that do the elective scans and they don't normally travel to the customer. However one of the owners seemed intrigued by the idea and may consider it. She asked what kind of expectations I would have... Other than hooking the monitor up to our tv and sending us some pictures/dvd afterwards I don't know what else there would be? We have an opportunity here to help build a great package that may even be offered by this company to other moms in the area in the future. Hypothetically what would you want?