There are actually two ways to get them still, you can get a friend who has it to let you recover their tag and download it onto your hard drive via download history, or you can get a Jtag and put the character pack onto a USB drive and install it into your
xbox that way. Both methods require somebody who already has the DLC, which is unfortunately something I have yet to find.
If you still want the DLC you have to start a commotion or something and get allot of people involved so that this complaint looks better and they might just put it back on the Marketplace so senf this to everyone you know and just keep sending it untill
something is done and we get the DLC back.