This is a tough one. And with movies coming at the pace that they are, the opportunities for reference books like the Incredible Cross Sections to take a deep dive with starship's like the Meson Martinet just don't seem to be there right now. As it was, that ship just seemed like a very basic set: a bulkhead with a hatch and the loading ramp, with little else. We never saw the entire ship. I'm wondering if there might be something in The Art of The Force Awakens?
I'm pretty sure I scored that whole book, and the TFA cross sections book too. No luck.
I'm hoping the X-wing miniatures game might bust this mystery wide open by releasing a game version of this ship. I don't play the game, but love the rare ships!