My brother is going as Bluto for Halloween and asked if I know of anyone making the pledge pins. It is really never screen scene, so your guess is as good as mine. Anyone?
Is he going to be handing them out with funny nicknames? That would be funny. I thought it was seen, a tiny bit when Niedermeyer confronts Flounder. I need to go check.
Although by the time of the movie, Bluto has been pre-med (I think) for several years. Once someone becomes a full member of a organization the pin wouldn't be worn.
Edit: you can have one made at greekgear.com for about twenty bucks.