Sorry, here's a link to a version that's actually available! http://www.zingermans.com/product.aspx?productid=p-crc

Think this may be what you're looking for: http://www.amazon.com/John-Copes-Dried-Sweet-Corn/dp/B000FA6MNO. You can just grind it fine in your food processor before using.

Well I was trying to keep it to the her recipe and not the attempted clones. I was thinking trying corn flour.

No problem. I found a few recipes for it online and I don't see corn powder in the ingredient list, so hopefully you're in luck! http://articles.latimes.com/2010/feb/11/food/la-fo-crackpierec11-2010feb11

Sorry. It's the crack pie recipe from the new momofuku milk bar book

Can you send us the link to the recipe or tell us what it is? Maybe there's a good substitute.