XDA Senior Member chadster214 posted the leaked build, which is labeled T999UVDLI3 and is based on Android 4.1. We’re not exactly sure how stable it is, as no information was provided in the OP, other than a download link. I won’t be flashing this one myself until I give the guinea pigs a chance to give it a once over first, but if you’re feeling ballsy and want to live on the bleeding edge, now is your chance to do so.
Head on over to the original ROM thread to pick up the file and join in on the discussion. Remember to make a Nandroid backup before doing anything else and don’t come crying to us if you end up with a brick. This is a leak for a reason.