X-Shuttle. It's really your only choice that fits all of those. Doesn't look all that cheap, but other than that it's good. Around 2mil, standard size freighter, infocard indicates that it was designed for exploration.
You can get it from Corfu Base (Omicron Theta) or Planet Harris (Tau-31).
The Spatial is an IMG ship. Now, they may be willing to sell it to you, but it *does* have that association. It does look pretty cheap, thanks to the texture...
