I know that some people have been looking for these shaped cutters. I have not used the website so cannot say how fast they are at shipping.
http://www.cheapcookiecutters.com/collections/greek-letter-cookie-cutters

Thanks, I may try it soon.

I got mine from Bake Greek. I love them! They even come in pretty boxes with a bow.
http://www.bakegreek.com/

Thanks for the update and info.

There are great metal ones at greeklifeproducts.com: http://greeklifeproducts.com/! We made really cute Rice crispy treats with these! Good luck!