Hey CAG, Was also one of those who missed that Feb deal on GMG, so was hunting down something that would work. So found it!
Use code MAR20OFF @ Gamefly.com
to make South Park Stick of Truth, that is steam redeemable for $47.99 and you will have the preorder bonuses provided you redeem the key on steam before it launches!
This code should also work for other digital titles that are about to be released too, however I can only confirm as of tonight the south park I just preordered. =) Hopefully this post will help others who are hunting down a deal on it!