Ozgameshop have 75 DLC code for PS3 and the same for Xbox 360 if your interested in getting one. You need to post a note in the linked thread on ozgameshop telling them which of the platforms you want one for. Although its technically a random competition, so far there's only been 95 posts in the thread so there's a very high probability you'll get one if you get in there soon.
Its obvious isn't it..... ! Through Buckscoop Australian consumers can freely share deals, vouchers or promo codes, bargains and freebies they think are worth mentioning. At Buckscoop you're participating in helping others to share in the good deals that you find and of course the share in those others find as well.