Email the National Iota Sweetheart Liasion, Bro. Shawn Patterson at
hardway63@hotmail.com and he can get you in touch with Sweethearts in order to market your product.
There are Sweethearts EVERYWHERE even though they may not be as visible on greekchat. I am sure you will get some responses from some as well.
Good luck and thank you for marketing items for Iota and Iota Sweethearts.