The following is just my opinion. Feel free to ignore it if you desire.
Since there seems to be so many options - the Neo Crusader logo, Boba Fett's Mandalorian skull emblem, and that new Clan Ordo logo - that aren't available in the game files, it seems to me this goes beyond the purpose of the mod which is restoration of cut content (and debugging.) However, these materials would make for a wonderful add-on mod. I hadn't seen that Clan Ordo logo before so I have to thank kradossk for pointing that out.
Somewhat still on topic: I think there can be a rationalization as to why that the Mandalorians have used the Star Forge symbol on their banners. The Mandalorians as described by Canderous in the first game fought their wars for the honor, the glory, and to have the most epic flights ever to be recorded. The only one that gave them that fight - ending with the Mandalorians' defeat - was Revan. And we all know that Revan had control of the Star Forge. (Oh sure, Malak may have controlled it at the end of the KotOR1 but who found discovered its location in the first place? Going further in this rambling: who destroyed it/abandoned it? To either destroy a thing or deny it any hold over you demonstrates power over a thing. Especially after their defeat at the nads of Revan and his fleet, Mandalorians would understand this lesson only too well. The Star Forge symbol on their banners could be considered both a tribute to Revan and/or a lesson in control.
However, it is more likely just simple recycling of game art. It still doesn't change the fact the above mentioned symbols aren't on the game discs.