Boxing fans are subtle. Only UFC posers were lame hats and tshirts.
http://1.bp.blogspot.com/-dt4ySidpCVE/Tb3EHb0eWCI/AAAAAAAAAR8/rV4pTPPR6ss/s1600/mmaposer.jpg
Lol@ the obligatory Scarface poster. Was such an awesome cult classic until it became part of the male teenager viewing criteria.
No idea, but I did get a badass Cleto Reyes hat from Forza sports, the one with the logo running over one side.
Haven't found other good boxing hats but am loving the Roots of Fight shirts. Some of the best fitting and feeling shirts I've owned. Very flattering cut, if you're in shape.