You can always use the tool I built for this. Just set the radio button under Misc Data to PS3.
Alternately I can list the addresses of each block. (NOTE: The below values are for PS3. For XBox add 0x0000D000 to each.)
Original Weapon File Offset: 0x0000041B to 0x000004A1
DLC Weapon File...
Is it piracy if it was released for free? Not in my opinion, but I also think it's not piracy if buying it isn't owning it, and it's not piracy if you can't buy it from the original creators anymore.