Kids' Football Jersey

I know I've seen some discussion on this recently, but I need to find a football jersey for a 6 year old, and I can't seem to find one in a little boy's size anywhere (including at the bookstore and at the 4-5 sites that sell SMU gear online). They have ones for little kids (like toddler age) and adult male and female jerseys, but nothing for a kid.
I've seen kids wearing jerseys around at games and on the Boulevard, so what gives? Anyone know where I can get one by Christmas? I don't care if it's exactly like the real jersey, but I'd like for it to be closer than the toddler ones at the bookstore, if possible.
Thanks
I've seen kids wearing jerseys around at games and on the Boulevard, so what gives? Anyone know where I can get one by Christmas? I don't care if it's exactly like the real jersey, but I'd like for it to be closer than the toddler ones at the bookstore, if possible.
Thanks