One of the most basic ones can be bought from supermarkets -
Krafts.
http://www.kraftfoods.com/kf/products/productinfodisplay.htm?siteid=1&product=2100065883
But like everyone said, unless you grew up eating the stuff,
after a few bites you want to throw it away liao.
If you are a good cook, and have an oven, then you can make your
own. Search epicurious.com
The Kenny Rogers one was quite decent when I last had it quite a
few years ago.
