1. Any ID that allows fighters also allows bombers. They're the same, as far as IDs are concerned.
2. I say this a lot, but it's particularly useful here. Border Worlds Transport. 3600 cargo, 9 turrets (4 forward, 6 side, 5 rear). One of my favorite transports. Zoner NPCs use the Dromedary (Border Worlds Freighter), so I figure a Zoner-based trader faction would use the BW Transport. You can buy it on Gas Miner Naha, Sigma-13.
3. The Freelancer ID's easy to get, it's the tag that's a pain in the ass.