Ah, Tsyal. Now I think I now better what you were referring to.
For anyone seeking this vessel, it can be found in Dan's update to Trevor John's T3G tutorial. The file you want to look for is : T3G_Tutorial_Vol_Vers_Phobos.zip
The pdf is in "la vrai lang ...", that is in French (pas de probleme), but the requisite files for the Frelon IX are there.