I have a comparison of badges (including 3 different economy, or plain, badges from Pollack, BPA, and M.O.D.) on our alumni website. Take a look.
http://alumni.bnzeta.org/history/index.htm
BTW, 127yardsale is listing a variety of pins and hats from all kinds of GLOs, not just Lambda Chi. No idea where he got them.
Jono