we have some available at the backbreaker forums, here i'll just give u the dl link...
http://www.endzone.it/site/backbreaker/
the logos are courtesy of dario and gbfan, i did all the rosters.
now keep in mind, they might not all be perfect rosters...it was the most current ones i found off nfl.com and yahoo for skin tones. if you decide to edit any, just make sure you delete the patch 1st.
anyways, just extract the rar file and put it in a directory and your usb drive like this:
PS3/SAVEDATA/BLUS30334-BBCUST_
TM/(all the custom bb files will be in this folder)
a lot of work went into these, so enjoy your nfl teams