I have "rescued" a couple of pledge pins off of Ebay. I gave one to a new member who lost hers and still have the other.
I don't know who bought the sapphire & ruby badges. They are being sold by a Zeta who is a former I/O employee so I am not comfortable bidding on items listed by her.
I'm going to Texas Zeta Days tomorrow and half the fun of figuring out what to wear is choosing a badge that will look pretty with my outfit.