Bearpaw has two 2-person innernets that will work with the Trailstar:
There are tradeoffs between the two, so you'll have to determine what is more important for you.
The PentaNet 2 is larger, and weighs more, but provides more netting protection, and the rooms it takes up means smaller vestibules. The PyraNet 2 is smaller, but can still accomodate two people. The PyraNet 2 can also be twirled around the center pole, so you determine where you want the doors to be relative to the tent opening, and being smaller will allow more room for your vestibule space. The PyraNet 2 can also better accomodate the lower pitch configurations of the Trailstar than the PentaNet 2. So, the PyraNet 2 is more versatile than the PentaNet 2, in exchange for netting space.
Also, with either innernet, you have the choice of what material to use (silnylon, cuben), the thickness of the No-See-um material, the height of the sidings, and the number of doors and where to put them on the innernet. And you can also request custom modifications. John Stultz, the owner of Bearpaw, has been very helpful with me on the numerous questions I asked him about his innernets.