Kadesh Freighter (Planet Los Angeles) might fit. It's whitish and sterile-looking, like you would expect a research vessel to look. And it's cheap, under 2mil I think. Or maybe an Armored Transport would be suitable.
The X-Shuttle is ugly and green and not at all fitting for Freelancer... I hate it. I hate it so much.
Maybe even a Camara Freighter? That's a nice ship.
